55657657 has 8 divisors (see below), whose sum is σ = 62358912. Its totient is φ = 49230000.

The previous prime is 55657649. The next prime is 55657687. The reversal of 55657657 is 75675655.

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

It is a cyclic number.

It is not a de Polignac number, because 55657657 - 2³ = 55657649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55657627) 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, 67969 + ... + 68782.

It is an arithmetic number, because the mean of its divisors is an integer number (7794864).

Almost surely, 2^55657657 is an apocalyptic number.

It is an amenable number.

55657657 is a deficient number, since it is larger than the sum of its proper divisors (6701255).

55657657 is a wasteful number, since it uses less digits than its factorization.

55657657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136799.

The product of its digits is 1102500, while the sum is 46.

The square root of 55657657 is about 7460.4059541020. The cubic root of 55657657 is about 381.8050250861.

The spelling of 55657657 in words is "fifty-five million, six hundred fifty-seven thousand, six hundred fifty-seven".