55766666755 has 16 divisors (see below), whose sum is σ = 69837260544. Its totient is φ = 42668920800.

The previous prime is 55766666741. The next prime is 55766666803.

55766666755 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55766666755 - 2²⁹ = 55229795843 is a prime.

It is a super-2 number, since 2×55766666755² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 1311580 + ... + 1353430.

It is an arithmetic number, because the mean of its divisors is an integer number (4364828784).

Almost surely, 2^55766666755 is an apocalyptic number.

55766666755 is a deficient number, since it is larger than the sum of its proper divisors (14070593789).

55766666755 is a wasteful number, since it uses less digits than its factorization.

55766666755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53466.

The product of its digits is 238140000, while the sum is 64.

The spelling of 55766666755 in words is "fifty-five billion, seven hundred sixty-six million, six hundred sixty-six thousand, seven hundred fifty-five".