666414260964 has 27 divisors (see below), whose sum is σ = 1684559540937. Its totient is φ = 222136454304.

The previous prime is 666414260951. The next prime is 666414260983. The reversal of 666414260964 is 469062414666.

The square root of 666414260964 is 816342.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 65776860900 + 600637400064 = 256470^2 + 775008^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666414260964.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4830024 + ... + 4966080.

Almost surely, 2^666414260964 is an apocalyptic number.

666414260964 is the 816342-nd square number.

It is an amenable number.

666414260964 is an abundant number, since it is smaller than the sum of its proper divisors (1018145279973).

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

666414260964 is an frugal number, since it uses more digits than its factorization.

666414260964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272124 (or 136062 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 666414260964 in words is "six hundred sixty-six billion, four hundred fourteen million, two hundred sixty thousand, nine hundred sixty-four".