659634168666 has 32 divisors (see below), whose sum is σ = 1440329024448. Its totient is φ = 199732586240.

The previous prime is 659634168631. The next prime is 659634168667. The reversal of 659634168666 is 666861436956.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 659634168597 and 659634168606.

It is not an unprimeable number, because it can be changed into a prime (659634168667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3828975 + ... + 3997538.

It is an arithmetic number, because the mean of its divisors is an integer number (45010282014).

Almost surely, 2^659634168666 is an apocalyptic number.

659634168666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

659634168666 is an abundant number, since it is smaller than the sum of its proper divisors (780694855782).

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

659634168666 is a wasteful number, since it uses less digits than its factorization.

659634168666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7827806.

The product of its digits is 201553920, while the sum is 66.

The spelling of 659634168666 in words is "six hundred fifty-nine billion, six hundred thirty-four million, one hundred sixty-eight thousand, six hundred sixty-six".