55801668 has 24 divisors (see below), whose sum is σ = 140219968. Its totient is φ = 17169696.

The previous prime is 55801649. The next prime is 55801679. The reversal of 55801668 is 86610855.

It is a super-2 number, since 2×55801668² = 6227652303164448, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178696 + ... + 179007.

Almost surely, 2^55801668 is an apocalyptic number.

It is an amenable number.

55801668 is an abundant number, since it is smaller than the sum of its proper divisors (84418300).

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

55801668 is a wasteful number, since it uses less digits than its factorization.

55801668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357723 (or 357721 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 55801668 is about 7470.0514054456. The cubic root of 55801668 is about 382.1340410246.

The spelling of 55801668 in words is "fifty-five million, eight hundred one thousand, six hundred sixty-eight".