55780666225 has 12 divisors (see below), whose sum is σ = 69175830400. Its totient is φ = 44619498000.

The previous prime is 55780666157. The next prime is 55780666247. The reversal of 55780666225 is 52266608755.

It is not a de Polignac number, because 55780666225 - 2²⁵ = 55747111793 is a prime.

It is a super-2 number, since 2×55780666225² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108700 + ... + 351250.

Almost surely, 2^55780666225 is an apocalyptic number.

It is an amenable number.

55780666225 is a deficient number, since it is larger than the sum of its proper divisors (13395164175).

55780666225 is a wasteful number, since it uses less digits than its factorization.

55780666225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251760 (or 251755 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 55780666225 in words is "fifty-five billion, seven hundred eighty million, six hundred sixty-six thousand, two hundred twenty-five".