55057770666 has 24 divisors (see below), whose sum is σ = 119310010560. Its totient is φ = 18349794216.

The previous prime is 55057770661. The next prime is 55057770667. The reversal of 55057770666 is 66607775055.

55057770666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55057770666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55057770661) 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, 109810 + ... + 349533.

It is an arithmetic number, because the mean of its divisors is an integer number (4971250440).

Almost surely, 2^55057770666 is an apocalyptic number.

55057770666 is an abundant number, since it is smaller than the sum of its proper divisors (64252239894).

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

55057770666 is a wasteful number, since it uses less digits than its factorization.

55057770666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466010 (or 466007 counting only the distinct ones).

The product of its (nonzero) digits is 9261000, while the sum is 54.

The spelling of 55057770666 in words is "fifty-five billion, fifty-seven million, seven hundred seventy thousand, six hundred sixty-six".