667681374480 has 80 divisors (see below), whose sum is σ = 2072094978624. Its totient is φ = 177852003840.

The previous prime is 667681374457. The next prime is 667681374497. The reversal of 667681374480 is 84473186766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315951 + ... + 1751310.

Almost surely, 2^667681374480 is an apocalyptic number.

667681374480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667681374480 is an abundant number, since it is smaller than the sum of its proper divisors (1404413604144).

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

667681374480 is a wasteful number, since it uses less digits than its factorization.

667681374480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068184 (or 3068178 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 60.

The spelling of 667681374480 in words is "six hundred sixty-seven billion, six hundred eighty-one million, three hundred seventy-four thousand, four hundred eighty".