55161660 has 48 divisors (see below), whose sum is σ = 154778400. Its totient is φ = 14678784.

The previous prime is 55161653. The next prime is 55161677. The reversal of 55161660 is 6616155.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49186 + ... + 50294.

It is an arithmetic number, because the mean of its divisors is an integer number (3224550).

Almost surely, 2^55161660 is an apocalyptic number.

It is an amenable number.

55161660 is an abundant number, since it is smaller than the sum of its proper divisors (99616740).

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

55161660 is a wasteful number, since it uses less digits than its factorization.

55161660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 55161660 is about 7427.0896049529. The cubic root of 55161660 is about 380.6674787646.

The spelling of 55161660 in words is "fifty-five million, one hundred sixty-one thousand, six hundred sixty".