659621766660 has 24 divisors (see below), whose sum is σ = 1846940946816. Its totient is φ = 175899137760.

The previous prime is 659621766659. The next prime is 659621766719. The reversal of 659621766660 is 66667126956.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 10993696111 = 659621766660 / (6 + 5 + 9 + 6 + 2 + 1 + 7 + 6 + 6 + 6 + 6 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 659621766594 and 659621766603.

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, 5496847996 + ... + 5496848115.

It is an arithmetic number, because the mean of its divisors is an integer number (76955872784).

Almost surely, 2^659621766660 is an apocalyptic number.

659621766660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

659621766660 is an abundant number, since it is smaller than the sum of its proper divisors (1187319180156).

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

659621766660 is a wasteful number, since it uses less digits than its factorization.

659621766660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10993696123 (or 10993696121 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 60.

The spelling of 659621766660 in words is "six hundred fifty-nine billion, six hundred twenty-one million, seven hundred sixty-six thousand, six hundred sixty".