667732606680 has 64 divisors (see below), whose sum is σ = 2004200640000. Its totient is φ = 177972888960.

The previous prime is 667732606661. The next prime is 667732606687. The reversal of 667732606680 is 86606237766.

It is a self number, because there is not a number n which added to its sum of digits gives 667732606680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667732606687) 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, 1151926 + ... + 1631685.

It is an arithmetic number, because the mean of its divisors is an integer number (31315635000).

Almost surely, 2^667732606680 is an apocalyptic number.

667732606680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667732606680 is an abundant number, since it is smaller than the sum of its proper divisors (1336468033320).

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

667732606680 is a wasteful number, since it uses less digits than its factorization.

667732606680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785624 (or 2785620 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 57.

The spelling of 667732606680 in words is "six hundred sixty-seven billion, seven hundred thirty-two million, six hundred six thousand, six hundred eighty".