663151431906 has 24 divisors (see below), whose sum is σ = 1436907763200. Its totient is φ = 221038221816.

The previous prime is 663151431881. The next prime is 663151431907. The reversal of 663151431906 is 609134151366.

663151431906 is a `hidden beast` number, since 6 + 6 + 315 + 14 + 319 + 0 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (663151431907) 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, 684610 + ... + 1339773.

It is an arithmetic number, because the mean of its divisors is an integer number (59871156800).

Almost surely, 2^663151431906 is an apocalyptic number.

663151431906 is an abundant number, since it is smaller than the sum of its proper divisors (773756331294).

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

663151431906 is a wasteful number, since it uses less digits than its factorization.

663151431906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042590 (or 2042587 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 663151431906 in words is "six hundred sixty-three billion, one hundred fifty-one million, four hundred thirty-one thousand, nine hundred six".