66156005108 has 12 divisors (see below), whose sum is σ = 116278569540. Its totient is φ = 32933556672.

The previous prime is 66156005107. The next prime is 66156005117. The reversal of 66156005108 is 80150065166.

It can be written as a sum of positive squares in 2 ways, for example, as 60077931664 + 6078073444 = 245108^2 + 77962^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156005101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36110441 + ... + 36112272.

It is an arithmetic number, because the mean of its divisors is an integer number (9689880795).

Almost surely, 2^66156005108 is an apocalyptic number.

It is an amenable number.

66156005108 is a deficient number, since it is larger than the sum of its proper divisors (50122564432).

66156005108 is a wasteful number, since it uses less digits than its factorization.

66156005108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72222946 (or 72222944 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 66156005108 in words is "sixty-six billion, one hundred fifty-six million, five thousand, one hundred eight".