669294993104 has 40 divisors (see below), whose sum is σ = 1373505605640. Its totient is φ = 314855313408.

The previous prime is 669294993089. The next prime is 669294993113. The reversal of 669294993104 is 401399492966.

It can be written as a sum of positive squares in 4 ways, for example, as 115681614400 + 553613378704 = 340120^2 + 744052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386582 + ... + 1219850.

It is an arithmetic number, because the mean of its divisors is an integer number (34337640141).

Almost surely, 2^669294993104 is an apocalyptic number.

It is an amenable number.

669294993104 is an abundant number, since it is smaller than the sum of its proper divisors (704210612536).

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

669294993104 is a wasteful number, since it uses less digits than its factorization.

669294993104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836247 (or 836241 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 62.

The spelling of 669294993104 in words is "six hundred sixty-nine billion, two hundred ninety-four million, nine hundred ninety-three thousand, one hundred four".