66659476 has 24 divisors (see below), whose sum is σ = 125982920. Its totient is φ = 30678912.

The previous prime is 66659473. The next prime is 66659477. The reversal of 66659476 is 67495666.

66659476 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2178576 + 64480900 = 1476^2 + 8030^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66659473) 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 7 ways as a sum of consecutive naturals, for example, 19030 + ... + 22258.

Almost surely, 2^66659476 is an apocalyptic number.

It is an amenable number.

66659476 is a deficient number, since it is larger than the sum of its proper divisors (59323444).

66659476 is a wasteful number, since it uses less digits than its factorization.

66659476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643 (or 3641 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 49.

The square root of 66659476 is about 8164.5254607968. The cubic root of 66659476 is about 405.4655541517.

The spelling of 66659476 in words is "sixty-six million, six hundred fifty-nine thousand, four hundred seventy-six".