665150135684 has 6 divisors (see below), whose sum is σ = 1164012737454. Its totient is φ = 332575067840.

The previous prime is 665150135609. The next prime is 665150135717. The reversal of 665150135684 is 486531051566.

It can be written as a sum of positive squares in only one way, i.e., 621066934084 + 44083201600 = 788078^2 + 209960^2 .

It is a super-2 number, since 2×665150135684² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83143766957 + ... + 83143766964.

It is an arithmetic number, because the mean of its divisors is an integer number (194002122909).

Almost surely, 2^665150135684 is an apocalyptic number.

It is an amenable number.

665150135684 is a deficient number, since it is larger than the sum of its proper divisors (498862601770).

665150135684 is a wasteful number, since it uses less digits than its factorization.

665150135684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166287533925 (or 166287533923 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 665150135684 in words is "six hundred sixty-five billion, one hundred fifty million, one hundred thirty-five thousand, six hundred eighty-four".