667724714064 has 60 divisors (see below), whose sum is σ = 1868772679956. Its totient is φ = 222566462976.

The previous prime is 667724714051. The next prime is 667724714119. The reversal of 667724714064 is 460417427766.

667724714064 is a `hidden beast` number, since 6 + 6 + 7 + 72 + 471 + 40 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 644006250000 + 23718464064 = 802500^2 + 154008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 667724714064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4578982 + ... + 4722554.

Almost surely, 2^667724714064 is an apocalyptic number.

It is an amenable number.

667724714064 is an abundant number, since it is smaller than the sum of its proper divisors (1201047965892).

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

667724714064 is a wasteful number, since it uses less digits than its factorization.

667724714064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175884 (or 175875 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 54.

The spelling of 667724714064 in words is "six hundred sixty-seven billion, seven hundred twenty-four million, seven hundred fourteen thousand, sixty-four".