65657457 has 12 divisors (see below), whose sum is σ = 95817540. Its totient is φ = 43319808.

The previous prime is 65657419. The next prime is 65657467. The reversal of 65657457 is 75475656.

It can be written as a sum of positive squares in 2 ways, for example, as 47941776 + 17715681 = 6924^2 + 4209^2 .

It is not a de Polignac number, because 65657457 - 2⁶ = 65657393 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (65657467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36732 + ... + 38477.

It is an arithmetic number, because the mean of its divisors is an integer number (7984795).

Almost surely, 2^65657457 is an apocalyptic number.

It is an amenable number.

65657457 is a deficient number, since it is larger than the sum of its proper divisors (30160083).

65657457 is a wasteful number, since it uses less digits than its factorization.

65657457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75312 (or 75309 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 65657457 is about 8102.9289149048. The cubic root of 65657457 is about 403.4236483920.

The spelling of 65657457 in words is "sixty-five million, six hundred fifty-seven thousand, four hundred fifty-seven".