56755661 has 2 divisors, whose sum is σ = 56755662. Its totient is φ = 56755660.

The previous prime is 56755631. The next prime is 56755711. The reversal of 56755661 is 16655765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53202436 + 3553225 = 7294^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 56755661 - 2⁶ = 56755597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56755631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28377830 + 28377831.

It is an arithmetic number, because the mean of its divisors is an integer number (28377831).

Almost surely, 2^56755661 is an apocalyptic number.

It is an amenable number.

56755661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56755661 is an equidigital number, since it uses as much as digits as its factorization.

56755661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 41.

The square root of 56755661 is about 7533.6353110567. The cubic root of 56755661 is about 384.2994197001.

The spelling of 56755661 in words is "fifty-six million, seven hundred fifty-five thousand, six hundred sixty-one".