669996002790 has 160 divisors (see below), whose sum is σ = 1822105739520. Its totient is φ = 176631840000.

The previous prime is 669996002759. The next prime is 669996002827. The reversal of 669996002790 is 97200699966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 57997515 + ... + 58009065.

It is an arithmetic number, because the mean of its divisors is an integer number (11388160872).

Almost surely, 2^669996002790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669996002790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911052869760).

669996002790 is an abundant number, since it is smaller than the sum of its proper divisors (1152109736730).

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

669996002790 is a wasteful number, since it uses less digits than its factorization.

669996002790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380 (or 12371 counting only the distinct ones).

The product of its (nonzero) digits is 19840464, while the sum is 63.

The spelling of 669996002790 in words is "six hundred sixty-nine billion, nine hundred ninety-six million, two thousand, seven hundred ninety".