664294585492466 has 16 divisors (see below), whose sum is σ = 996584932205280. Its totient is φ = 332099610541440.

The previous prime is 664294585492459. The next prime is 664294585492477.

664294585492466 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×664294585492466² (a number of 30 digits) contains 22 as substring.

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, 559815170 + ... + 561000546.

It is an arithmetic number, because the mean of its divisors is an integer number (62286558262830).

Almost surely, 2^{664294585492466} is an apocalyptic number.

664294585492466 is a deficient number, since it is larger than the sum of its proper divisors (332290346712814).

664294585492466 is a wasteful number, since it uses less digits than its factorization.

664294585492466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225369.

The product of its digits is 21499084800, while the sum is 80.

The spelling of 664294585492466 in words is "six hundred sixty-four trillion, two hundred ninety-four billion, five hundred eighty-five million, four hundred ninety-two thousand, four hundred sixty-six".