501882400665 has 12 divisors (see below), whose sum is σ = 869929494564. Its totient is φ = 267670613664.

The previous prime is 501882400639. The next prime is 501882400681. The reversal of 501882400665 is 566004288105.

501882400665 is a `hidden beast` number, since 5 + 0 + 188 + 2 + 400 + 6 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 327803196681 + 174079203984 = 572541^2 + 417228^2 .

It is not a de Polignac number, because 501882400665 - 2¹¹ = 501882398617 is a prime.

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), and also a Moran number because the ratio is a prime number: 11152942237 = 501882400665 / (5 + 0 + 1 + 8 + 8 + 2 + 4 + 0 + 0 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 501882400665.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5576471074 + ... + 5576471163.

It is an arithmetic number, because the mean of its divisors is an integer number (72494124547).

Almost surely, 2^501882400665 is an apocalyptic number.

It is an amenable number.

501882400665 is a deficient number, since it is larger than the sum of its proper divisors (368047093899).

501882400665 is a wasteful number, since it uses less digits than its factorization.

501882400665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11152942248 (or 11152942245 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 501882400665 in words is "five hundred one billion, eight hundred eighty-two million, four hundred thousand, six hundred sixty-five".