55657977 has 8 divisors (see below), whose sum is σ = 74320800. Its totient is φ = 37050240.

The previous prime is 55657939. The next prime is 55657991. The reversal of 55657977 is 77975655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55657977 - 2²⁴ = 38880761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55657937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11352 + ... + 15497.

It is an arithmetic number, because the mean of its divisors is an integer number (9290100).

Almost surely, 2^55657977 is an apocalyptic number.

It is an amenable number.

55657977 is a deficient number, since it is larger than the sum of its proper divisors (18662823).

55657977 is a wasteful number, since it uses less digits than its factorization.

55657977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27543.

The product of its digits is 2315250, while the sum is 51.

The square root of 55657977 is about 7460.4274006252. The cubic root of 55657977 is about 381.8057568055.

The spelling of 55657977 in words is "fifty-five million, six hundred fifty-seven thousand, nine hundred seventy-seven".