659990794716 has 384 divisors, whose sum is σ = 1966635417600. Its totient is φ = 189586656000.

The previous prime is 659990794663. The next prime is 659990794721. The reversal of 659990794716 is 617497099956.

It is a happy number.

659990794716 is a `hidden beast` number, since 65 + 9 + 9 + 90 + 7 + 9 + 471 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 452357595 + ... + 452359053.

It is an arithmetic number, because the mean of its divisors is an integer number (5121446400).

Almost surely, 2^659990794716 is an apocalyptic number.

659990794716 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659990794716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983317708800).

659990794716 is an abundant number, since it is smaller than the sum of its proper divisors (1306644622884).

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

659990794716 is a wasteful number, since it uses less digits than its factorization.

659990794716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 231472080, while the sum is 72.

The spelling of 659990794716 in words is "six hundred fifty-nine billion, nine hundred ninety million, seven hundred ninety-four thousand, seven hundred sixteen".