669249696516 has 48 divisors (see below), whose sum is σ = 1632136136064. Its totient is φ = 213035809536.

The previous prime is 669249696509. The next prime is 669249696523. The reversal of 669249696516 is 615696942966.

It is a happy number.

669249696516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (669249696509) and next prime (669249696523).

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1808641 + ... + 2147016.

It is an arithmetic number, because the mean of its divisors is an integer number (34002836168).

Almost surely, 2^669249696516 is an apocalyptic number.

It is an amenable number.

669249696516 is an abundant number, since it is smaller than the sum of its proper divisors (962886439548).

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

669249696516 is a wasteful number, since it uses less digits than its factorization.

669249696516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956300 (or 3956298 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 69.

The spelling of 669249696516 in words is "six hundred sixty-nine billion, two hundred forty-nine million, six hundred ninety-six thousand, five hundred sixteen".