664560713722 has 8 divisors (see below), whose sum is σ = 998871298272. Its totient is φ = 331603614300.

The previous prime is 664560713689. The next prime is 664560713743. The reversal of 664560713722 is 227317065466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338370054 + ... + 338372017.

It is an arithmetic number, because the mean of its divisors is an integer number (124858912284).

Almost surely, 2^664560713722 is an apocalyptic number.

664560713722 is a deficient number, since it is larger than the sum of its proper divisors (334310584550).

664560713722 is a wasteful number, since it uses less digits than its factorization.

664560713722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676742564.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 664560713722 in words is "six hundred sixty-four billion, five hundred sixty million, seven hundred thirteen thousand, seven hundred twenty-two".