666158506236 has 48 divisors (see below), whose sum is σ = 1731300407200. Its totient is φ = 221509904256.

The previous prime is 666158506231. The next prime is 666158506267. The reversal of 666158506236 is 632605851666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666158506231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7496335 + ... + 7584678.

Almost surely, 2^666158506236 is an apocalyptic number.

It is an amenable number.

666158506236 is an abundant number, since it is smaller than the sum of its proper divisors (1065141900964).

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

666158506236 is a wasteful number, since it uses less digits than its factorization.

666158506236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15081435 (or 15081427 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 666158506236 in words is "six hundred sixty-six billion, one hundred fifty-eight million, five hundred six thousand, two hundred thirty-six".