646660322 has 32 divisors (see below), whose sum is σ = 1242034560. Its totient is φ = 245134080.

The previous prime is 646660319. The next prime is 646660327. The reversal of 646660322 is 223066646.

It is not an unprimeable number, because it can be changed into a prime (646660327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51047 + ... + 62442.

It is an arithmetic number, because the mean of its divisors is an integer number (38813580).

Almost surely, 2^646660322 is an apocalyptic number.

646660322 is a deficient number, since it is larger than the sum of its proper divisors (595374238).

646660322 is a wasteful number, since it uses less digits than its factorization.

646660322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113546.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 646660322 is about 25429.5167472762. The cubic root of 646660322 is about 864.7529881526.

The spelling of 646660322 in words is "six hundred forty-six million, six hundred sixty thousand, three hundred twenty-two".