667763565072 has 40 divisors (see below), whose sum is σ = 1726169726400. Its totient is φ = 222444132480.

The previous prime is 667763565059. The next prime is 667763565169. The reversal of 667763565072 is 270565367766.

667763565072 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 667763564997 and 667763565015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4416204 + ... + 4564907.

It is an arithmetic number, because the mean of its divisors is an integer number (43154243160).

Almost surely, 2^667763565072 is an apocalyptic number.

It is an amenable number.

667763565072 is an abundant number, since it is smaller than the sum of its proper divisors (1058406161328).

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

667763565072 is a wasteful number, since it uses less digits than its factorization.

667763565072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8982671 (or 8982665 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 60.

The spelling of 667763565072 in words is "six hundred sixty-seven billion, seven hundred sixty-three million, five hundred sixty-five thousand, seventy-two".