669403865088 has 784 divisors, whose sum is σ = 2337888176640. Its totient is φ = 187615346688.

The previous prime is 669403865057. The next prime is 669403865093. The reversal of 669403865088 is 880568304966.

669403865088 is a `hidden beast` number, since 6 + 6 + 9 + 40 + 3 + 86 + 508 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2800852873 + ... + 2800853111.

Almost surely, 2^669403865088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669403865088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168944088320).

669403865088 is an abundant number, since it is smaller than the sum of its proper divisors (1668484311552).

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

669403865088 is an frugal number, since it uses more digits than its factorization.

669403865088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 63.

The spelling of 669403865088 in words is "six hundred sixty-nine billion, four hundred three million, eight hundred sixty-five thousand, eighty-eight".