55661626 has 16 divisors (see below), whose sum is σ = 84790944. Its totient is φ = 27400464.

The previous prime is 55661611. The next prime is 55661629. The reversal of 55661626 is 62616655.

It is not an unprimeable number, because it can be changed into a prime (55661629) 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, 90496 + ... + 91108.

It is an arithmetic number, because the mean of its divisors is an integer number (5299434).

Almost surely, 2^55661626 is an apocalyptic number.

55661626 is a deficient number, since it is larger than the sum of its proper divisors (29129318).

55661626 is a wasteful number, since it uses less digits than its factorization.

55661626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245.

The product of its digits is 64800, while the sum is 37.

The square root of 55661626 is about 7460.6719536514. The cubic root of 55661626 is about 381.8141004958.

The spelling of 55661626 in words is "fifty-five million, six hundred sixty-one thousand, six hundred twenty-six".