55665057 has 32 divisors (see below), whose sum is σ = 89964544. Its totient is φ = 29937600.

The previous prime is 55665053. The next prime is 55665107. The reversal of 55665057 is 75056655.

It is not a de Polignac number, because 55665057 - 2² = 55665053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55665053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22932 + ... + 25242.

It is an arithmetic number, because the mean of its divisors is an integer number (2811392).

Almost surely, 2^55665057 is an apocalyptic number.

It is an amenable number.

55665057 is a deficient number, since it is larger than the sum of its proper divisors (34299487).

55665057 is a wasteful number, since it uses less digits than its factorization.

55665057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389.

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 55665057 is about 7460.9018891820. The cubic root of 55665057 is about 381.8219453814.

The spelling of 55665057 in words is "fifty-five million, six hundred sixty-five thousand, fifty-seven".