666465464564666 has 8 divisors (see below), whose sum is σ = 1076598058142964. Its totient is φ = 307599445183680.

The previous prime is 666465464564639. The next prime is 666465464564701.

666465464564666 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 664305725708641 + 2159738856025 = 25774129^2 + 1469605^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12816643549295 + ... + 12816643549346.

Almost surely, 2^{666465464564666} is an apocalyptic number.

666465464564666 is a deficient number, since it is larger than the sum of its proper divisors (410132593578298).

666465464564666 is a wasteful number, since it uses less digits than its factorization.

666465464564666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25633287098656.

The product of its digits is 64497254400, while the sum is 80.

The spelling of 666465464564666 in words is "six hundred sixty-six trillion, four hundred sixty-five billion, four hundred sixty-four million, five hundred sixty-four thousand, six hundred sixty-six".