667606620731632 has 40 divisors (see below), whose sum is σ = 1406590896880656. Its totient is φ = 305676799312896.

The previous prime is 667606620731551. The next prime is 667606620731657. The reversal of 667606620731632 is 236137026606766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33168045418 + ... + 33168065545.

Almost surely, 2^{667606620731632} is an apocalyptic number.

It is an amenable number.

667606620731632 is an abundant number, since it is smaller than the sum of its proper divisors (738984276149024).

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

667606620731632 is a wasteful number, since it uses less digits than its factorization.

667606620731632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66336111025 (or 66336111019 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 61.

The spelling of 667606620731632 in words is "six hundred sixty-seven trillion, six hundred six billion, six hundred twenty million, seven hundred thirty-one thousand, six hundred thirty-two".