666295362432 has 448 divisors, whose sum is σ = 2373420994560. Its totient is φ = 182089036800.

The previous prime is 666295362413. The next prime is 666295362443. The reversal of 666295362432 is 234263592666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 15001057 + ... + 15045407.

It is an arithmetic number, because the mean of its divisors is an integer number (5297814720).

Almost surely, 2^666295362432 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 666295362432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186710497280).

666295362432 is an abundant number, since it is smaller than the sum of its proper divisors (1707125632128).

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

666295362432 is an equidigital number, since it uses as much as digits as its factorization.

666295362432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44413 (or 44386 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 54.

The spelling of 666295362432 in words is "six hundred sixty-six billion, two hundred ninety-five million, three hundred sixty-two thousand, four hundred thirty-two".