57699666 has 48 divisors (see below), whose sum is σ = 133191864. Its totient is φ = 17989632.

The previous prime is 57699661. The next prime is 57699671. The reversal of 57699666 is 66699675.

57699666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57699661) and next prime (57699671).

It can be written as a sum of positive squares in 4 ways, for example, as 56927025 + 772641 = 7545^2 + 879^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57699661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58570 + ... + 59546.

Almost surely, 2^57699666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57699666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66595932).

57699666 is an abundant number, since it is smaller than the sum of its proper divisors (75492198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57699666 is a wasteful number, since it uses less digits than its factorization.

57699666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195 (or 1192 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 57699666 is about 7596.0296207953. The cubic root of 57699666 is about 386.4183719387.

Subtracting 57699666 from its reverse (66699675), we obtain a palindrome (9000009).

The spelling of 57699666 in words is "fifty-seven million, six hundred ninety-nine thousand, six hundred sixty-six".