55166306577 has 16 divisors (see below), whose sum is σ = 74961581760. Its totient is φ = 36074630592.

The previous prime is 55166306563. The next prime is 55166306623. The reversal of 55166306577 is 77560366155.

It is a happy number.

It is not a de Polignac number, because 55166306577 - 2¹⁵ = 55166273809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55166306077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629703 + ... + 711939.

It is an arithmetic number, because the mean of its divisors is an integer number (4685098860).

Almost surely, 2^55166306577 is an apocalyptic number.

It is an amenable number.

55166306577 is a deficient number, since it is larger than the sum of its proper divisors (19795275183).

55166306577 is a wasteful number, since it uses less digits than its factorization.

55166306577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86512.

The product of its (nonzero) digits is 3969000, while the sum is 51.

The spelling of 55166306577 in words is "fifty-five billion, one hundred sixty-six million, three hundred six thousand, five hundred seventy-seven".