669615458723 has 2 divisors, whose sum is σ = 669615458724. Its totient is φ = 669615458722.

The previous prime is 669615458717. The next prime is 669615458741. The reversal of 669615458723 is 327854516966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669615458723 - 2²⁶ = 669548349859 is a prime.

It is not a weakly prime, because it can be changed into another prime (669615458023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334807729361 + 334807729362.

It is an arithmetic number, because the mean of its divisors is an integer number (334807729362).

Almost surely, 2^669615458723 is an apocalyptic number.

669615458723 is a deficient number, since it is larger than the sum of its proper divisors (1).

669615458723 is an equidigital number, since it uses as much as digits as its factorization.

669615458723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 62.

The spelling of 669615458723 in words is "six hundred sixty-nine billion, six hundred fifteen million, four hundred fifty-eight thousand, seven hundred twenty-three".