65556457 has 4 divisors (see below), whose sum is σ = 65790036. Its totient is φ = 65322880.

The previous prime is 65556451. The next prime is 65556487. The reversal of 65556457 is 75465556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55890576 + 9665881 = 7476^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 65556457 - 2⁷ = 65556329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65556451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116368 + ... + 116929.

It is an arithmetic number, because the mean of its divisors is an integer number (16447509).

Almost surely, 2^65556457 is an apocalyptic number.

It is an amenable number.

65556457 is a deficient number, since it is larger than the sum of its proper divisors (233579).

65556457 is a wasteful number, since it uses less digits than its factorization.

65556457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233578.

The product of its digits is 630000, while the sum is 43.

The square root of 65556457 is about 8096.6942019567. The cubic root of 65556457 is about 403.2166818055.

Subtracting 65556457 from its reverse (75465556), we obtain a palindrome (9909099).

The spelling of 65556457 in words is "sixty-five million, five hundred fifty-six thousand, four hundred fifty-seven".