55556670 has 32 divisors (see below), whose sum is σ = 143593632. Its totient is φ = 13675392.

The previous prime is 55556639. The next prime is 55556687. The reversal of 55556670 is 7665555.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70837 + ... + 71616.

It is an arithmetic number, because the mean of its divisors is an integer number (4487301).

Almost surely, 2^55556670 is an apocalyptic number.

55556670 is an abundant number, since it is smaller than the sum of its proper divisors (88036962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55556670 is a wasteful number, since it uses less digits than its factorization.

55556670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142476.

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

The square root of 55556670 is about 7453.6346838304. The cubic root of 55556670 is about 381.5739656082.

The spelling of 55556670 in words is "fifty-five million, five hundred fifty-six thousand, six hundred seventy".