664710364690 has 8 divisors (see below), whose sum is σ = 1196478656460. Its totient is φ = 265884145872.

The previous prime is 664710364631. The next prime is 664710364691. The reversal of 664710364690 is 96463017466.

664710364690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 660856810761 + 3853553929 = 812931^2 + 62077^2 .

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

It is a super-2 number, since 2×664710364690² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664710364691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33235518225 + ... + 33235518244.

Almost surely, 2^664710364690 is an apocalyptic number.

664710364690 is a deficient number, since it is larger than the sum of its proper divisors (531768291770).

664710364690 is a wasteful number, since it uses less digits than its factorization.

664710364690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66471036476.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 664710364690 in words is "six hundred sixty-four billion, seven hundred ten million, three hundred sixty-four thousand, six hundred ninety".