667619587952 has 20 divisors (see below), whose sum is σ = 1293527733480. Its totient is φ = 333805979328.

The previous prime is 667619587951. The next prime is 667619587963. The reversal of 667619587952 is 259785916766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667619587951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666823 + ... + 2028185.

It is an arithmetic number, because the mean of its divisors is an integer number (64676386674).

Almost surely, 2^667619587952 is an apocalyptic number.

It is an amenable number.

667619587952 is a deficient number, since it is larger than the sum of its proper divisors (625908145528).

667619587952 is a wasteful number, since it uses less digits than its factorization.

667619587952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476840 (or 476834 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 71.

The spelling of 667619587952 in words is "six hundred sixty-seven billion, six hundred nineteen million, five hundred eighty-seven thousand, nine hundred fifty-two".