667745322505320 has 256 divisors, whose sum is σ = 2208871185684480. Its totient is φ = 160749556531200.

The previous prime is 667745322505279. The next prime is 667745322505361. The reversal of 667745322505320 is 23505223547766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (667745322505279) and next prime (667745322505361).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39574711 + ... + 53866950.

It is an arithmetic number, because the mean of its divisors is an integer number (8628403069080).

Almost surely, 2^{667745322505320} is an apocalyptic number.

667745322505320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667745322505320 is an abundant number, since it is smaller than the sum of its proper divisors (1541125863179160).

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

667745322505320 is a wasteful number, since it uses less digits than its factorization.

667745322505320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93441836 (or 93441832 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 57.

The spelling of 667745322505320 in words is "six hundred sixty-seven trillion, seven hundred forty-five billion, three hundred twenty-two million, five hundred five thousand, three hundred twenty".