665072186130 has 640 divisors, whose sum is σ = 2100493866240. Its totient is φ = 149299200000.

The previous prime is 665072186063. The next prime is 665072186167. The reversal of 665072186130 is 31681270566.

665072186130 is a `hidden beast` number, since 6 + 6 + 5 + 0 + 7 + 21 + 8 + 613 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1658533930 + ... + 1658534330.

It is an arithmetic number, because the mean of its divisors is an integer number (3282021666).

Almost surely, 2^665072186130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665072186130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050246933120).

665072186130 is an abundant number, since it is smaller than the sum of its proper divisors (1435421680110).

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

665072186130 is a wasteful number, since it uses less digits than its factorization.

665072186130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 665072186130 in words is "six hundred sixty-five billion, seventy-two million, one hundred eighty-six thousand, one hundred thirty".