667472626413665 has 4 divisors (see below), whose sum is σ = 800967151696404. Its totient is φ = 533978101130928.

The previous prime is 667472626413623. The next prime is 667472626413701. The reversal of 667472626413665 is 566314626274766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94902433436944 + 572570192976721 = 9741788^2 + 23928439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667472626413665 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 66747262641362 + ... + 66747262641371.

It is an arithmetic number, because the mean of its divisors is an integer number (200241787924101).

Almost surely, 2^{667472626413665} is an apocalyptic number.

It is an amenable number.

667472626413665 is a deficient number, since it is larger than the sum of its proper divisors (133494525282739).

667472626413665 is a wasteful number, since it uses less digits than its factorization.

667472626413665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133494525282738.

The product of its digits is 2194698240, while the sum is 71.

The spelling of 667472626413665 in words is "six hundred sixty-seven trillion, four hundred seventy-two billion, six hundred twenty-six million, four hundred thirteen thousand, six hundred sixty-five".