646400662 has 8 divisors (see below), whose sum is σ = 1003035600. Its totient is φ = 312055464.

The previous prime is 646400659. The next prime is 646400701. The reversal of 646400662 is 266004646.

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

It is a congruent number.

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, 5572362 + ... + 5572477.

It is an arithmetic number, because the mean of its divisors is an integer number (125379450).

Almost surely, 2^646400662 is an apocalyptic number.

646400662 is a deficient number, since it is larger than the sum of its proper divisors (356634938).

646400662 is a wasteful number, since it uses less digits than its factorization.

646400662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11144870.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 646400662 is about 25424.4107503006. The cubic root of 646400662 is about 864.6372283459.

The spelling of 646400662 in words is "six hundred forty-six million, four hundred thousand, six hundred sixty-two".