66156110055 has 36 divisors (see below), whose sum is σ = 133392324312. Its totient is φ = 30242792160.

The previous prime is 66156110047. The next prime is 66156110057. The reversal of 66156110055 is 55001165166.

It is not a de Polignac number, because 66156110055 - 2³ = 66156110047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156110057) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14999181 + ... + 15003590.

It is an arithmetic number, because the mean of its divisors is an integer number (3705342342).

Almost surely, 2^66156110055 is an apocalyptic number.

66156110055 is an abundant number, since it is smaller than the sum of its proper divisors (67236214257).

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

66156110055 is a wasteful number, since it uses less digits than its factorization.

66156110055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30002796 (or 30002786 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 66156110055 in words is "sixty-six billion, one hundred fifty-six million, one hundred ten thousand, fifty-five".