55666422 has 24 divisors (see below), whose sum is σ = 137840976. Its totient is φ = 15904656.

The previous prime is 55666393. The next prime is 55666427. The reversal of 55666422 is 22466655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220773 + ... + 221024.

It is an arithmetic number, because the mean of its divisors is an integer number (5743374).

Almost surely, 2^55666422 is an apocalyptic number.

55666422 is an abundant number, since it is smaller than the sum of its proper divisors (82174554).

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

55666422 is a wasteful number, since it uses less digits than its factorization.

55666422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441812 (or 441809 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 55666422 is about 7460.9933654977. The cubic root of 55666422 is about 381.8250663261.

The spelling of 55666422 in words is "fifty-five million, six hundred sixty-six thousand, four hundred twenty-two".