664649410 has 16 divisors (see below), whose sum is σ = 1199152512. Its totient is φ = 265241200.

The previous prime is 664649341. The next prime is 664649429. The reversal of 664649410 is 14946466.

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, 72796 + ... + 81415.

It is an arithmetic number, because the mean of its divisors is an integer number (74947032).

Almost surely, 2^664649410 is an apocalyptic number.

664649410 is a deficient number, since it is larger than the sum of its proper divisors (534503102).

664649410 is a wasteful number, since it uses less digits than its factorization.

664649410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154649.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 664649410 is about 25780.7953717491. The cubic root of 664649410 is about 872.6984565105.

The spelling of 664649410 in words is "six hundred sixty-four million, six hundred forty-nine thousand, four hundred ten".