55661164 has 18 divisors (see below), whose sum is σ = 105477540. Its totient is φ = 25689456.

The previous prime is 55661147. The next prime is 55661171. The reversal of 55661164 is 46116655.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40494 + ... + 41845.

Almost surely, 2^55661164 is an apocalyptic number.

It is an amenable number.

55661164 is a deficient number, since it is larger than the sum of its proper divisors (49816376).

55661164 is a wasteful number, since it uses less digits than its factorization.

55661164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82369 (or 82354 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 55661164 is about 7460.6409912286. The cubic root of 55661164 is about 381.8130441211.

The spelling of 55661164 in words is "fifty-five million, six hundred sixty-one thousand, one hundred sixty-four".