646431013066 has 8 divisors (see below), whose sum is σ = 977048401824. Its totient is φ = 320748212460.

The previous prime is 646431013031. The next prime is 646431013099. The reversal of 646431013066 is 660310134646.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233646710 + ... + 1233647233.

It is an arithmetic number, because the mean of its divisors is an integer number (122131050228).

Almost surely, 2^646431013066 is an apocalyptic number.

646431013066 is a deficient number, since it is larger than the sum of its proper divisors (330617388758).

646431013066 is a wasteful number, since it uses less digits than its factorization.

646431013066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467294076.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 646431013066 in words is "six hundred forty-six billion, four hundred thirty-one million, thirteen thousand, sixty-six".