664611340 has 24 divisors (see below), whose sum is σ = 1397868192. Its totient is φ = 265428480.

The previous prime is 664611323. The next prime is 664611359. The reversal of 664611340 is 43116466.

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, 12741 + ... + 38620.

It is an arithmetic number, because the mean of its divisors is an integer number (58244508).

Almost surely, 2^664611340 is an apocalyptic number.

It is an amenable number.

664611340 is an abundant number, since it is smaller than the sum of its proper divisors (733256852).

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

664611340 is a wasteful number, since it uses less digits than its factorization.

664611340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52017 (or 52015 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 664611340 is about 25780.0570208834. The cubic root of 664611340 is about 872.6817939593.

The spelling of 664611340 in words is "six hundred sixty-four million, six hundred eleven thousand, three hundred forty".