662684669 has 2 divisors, whose sum is σ = 662684670. Its totient is φ = 662684668.

The previous prime is 662684657. The next prime is 662684719. The reversal of 662684669 is 966486266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657255769 + 5428900 = 25637^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 662684669 - 2²⁰ = 661636093 is a prime.

It is a super-2 number, since 2×662684669² = 878301941055279122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 662684669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662684609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331342334 + 331342335.

It is an arithmetic number, because the mean of its divisors is an integer number (331342335).

Almost surely, 2^662684669 is an apocalyptic number.

It is an amenable number.

662684669 is a deficient number, since it is larger than the sum of its proper divisors (1).

662684669 is an equidigital number, since it uses as much as digits as its factorization.

662684669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 53.

The square root of 662684669 is about 25742.6624302926. The cubic root of 662684669 is about 871.8376925734.

The spelling of 662684669 in words is "six hundred sixty-two million, six hundred eighty-four thousand, six hundred sixty-nine".