57707661 has 16 divisors (see below), whose sum is σ = 84284928. Its totient is φ = 34830000.

The previous prime is 57707653. The next prime is 57707669. The reversal of 57707661 is 16670775.

It is an interprime number because it is at equal distance from previous prime (57707653) and next prime (57707669).

It is not a de Polignac number, because 57707661 - 2³ = 57707653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57707669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4800 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (5267808).

Almost surely, 2^57707661 is an apocalyptic number.

It is an amenable number.

57707661 is a deficient number, since it is larger than the sum of its proper divisors (26577267).

57707661 is a wasteful number, since it uses less digits than its factorization.

57707661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7232.

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 57707661 is about 7596.5558643375. Note that the first 3 decimals coincide. The cubic root of 57707661 is about 386.4362187908.

It can be divided in two parts, 5770 and 7661, that added together give a palindrome (13431).

The spelling of 57707661 in words is "fifty-seven million, seven hundred seven thousand, six hundred sixty-one".