667214537520 has 40 divisors (see below), whose sum is σ = 2068365067056. Its totient is φ = 177923876608.

The previous prime is 667214537449. The next prime is 667214537531. The reversal of 667214537520 is 25735412766.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 667214537520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390030047 + ... + 1390030526.

Almost surely, 2^667214537520 is an apocalyptic number.

667214537520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667214537520 is an abundant number, since it is smaller than the sum of its proper divisors (1401150529536).

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

667214537520 is a wasteful number, since it uses less digits than its factorization.

667214537520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780060589 (or 2780060583 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 667214537520 in words is "six hundred sixty-seven billion, two hundred fourteen million, five hundred thirty-seven thousand, five hundred twenty".