667631999027 has 16 divisors (see below), whose sum is σ = 815040315072. Its totient is φ = 533827553280.

The previous prime is 667631998949. The next prime is 667631999029. The reversal of 667631999027 is 720999136766.

It is not a de Polignac number, because 667631999027 - 2⁸ = 667631998771 is a prime.

It is a super-2 number, since 2×667631999027² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667631999029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24811124 + ... + 24838017.

It is an arithmetic number, because the mean of its divisors is an integer number (50940019692).

Almost surely, 2^667631999027 is an apocalyptic number.

667631999027 is a deficient number, since it is larger than the sum of its proper divisors (147408316045).

667631999027 is a wasteful number, since it uses less digits than its factorization.

667631999027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49649278.

The product of its (nonzero) digits is 46294416, while the sum is 65.

The spelling of 667631999027 in words is "six hundred sixty-seven billion, six hundred thirty-one million, nine hundred ninety-nine thousand, twenty-seven".