667746764764502 has 16 divisors (see below), whose sum is σ = 1004946818489712. Its totient is φ = 332764760739840.

The previous prime is 667746764764379. The next prime is 667746764764559. The reversal of 667746764764502 is 205467467647766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62228624 + ... + 72165747.

It is an arithmetic number, because the mean of its divisors is an integer number (62809176155607).

Almost surely, 2^{667746764764502} is an apocalyptic number.

667746764764502 is a deficient number, since it is larger than the sum of its proper divisors (337200053725210).

667746764764502 is a wasteful number, since it uses less digits than its factorization.

667746764764502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134402623.

The product of its (nonzero) digits is 11948912640, while the sum is 77.

The spelling of 667746764764502 in words is "six hundred sixty-seven trillion, seven hundred forty-six billion, seven hundred sixty-four million, seven hundred sixty-four thousand, five hundred two".