646349466 has 32 divisors (see below), whose sum is σ = 1479300480. Its totient is φ = 184430016.

The previous prime is 646349453. The next prime is 646349479. The reversal of 646349466 is 664943646.

It is an interprime number because it is at equal distance from previous prime (646349453) and next prime (646349479).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23820 + ... + 43128.

It is an arithmetic number, because the mean of its divisors is an integer number (46228140).

Almost surely, 2^646349466 is an apocalyptic number.

646349466 is an abundant number, since it is smaller than the sum of its proper divisors (832951014).

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

646349466 is a wasteful number, since it uses less digits than its factorization.

646349466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20118.

The product of its digits is 2239488, while the sum is 48.

The square root of 646349466 is about 25423.4039027035. The cubic root of 646349466 is about 864.6144008444.

The spelling of 646349466 in words is "six hundred forty-six million, three hundred forty-nine thousand, four hundred sixty-six".