665941627008 has 320 divisors, whose sum is σ = 2338021086720. Its totient is φ = 184130703360.

The previous prime is 665941626979. The next prime is 665941627019. The reversal of 665941627008 is 800726149566.

665941627008 is a `hidden beast` number, since 6 + 6 + 5 + 9 + 4 + 1 + 627 + 0 + 0 + 8 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2101860 + ... + 2397852.

It is an arithmetic number, because the mean of its divisors is an integer number (7306315896).

Almost surely, 2^665941627008 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 665941627008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169010543360).

665941627008 is an abundant number, since it is smaller than the sum of its proper divisors (1672079459712).

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

665941627008 is a wasteful number, since it uses less digits than its factorization.

665941627008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296057 (or 296036 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 665941627008 in words is "six hundred sixty-five billion, nine hundred forty-one million, six hundred twenty-seven thousand, eight".