668287501011 has 24 divisors (see below), whose sum is σ = 1094271935120. Its totient is φ = 389608906176.

The previous prime is 668287501003. The next prime is 668287501033. The reversal of 668287501011 is 110105782866.

668287501011 is a `hidden beast` number, since 6 + 68 + 2 + 87 + 501 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 668287501011 - 2³ = 668287501003 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 not an unprimeable number, because it can be changed into a prime (668287501051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150309856 + ... + 150314301.

Almost surely, 2^668287501011 is an apocalyptic number.

668287501011 is a deficient number, since it is larger than the sum of its proper divisors (425984434109).

668287501011 is a wasteful number, since it uses less digits than its factorization.

668287501011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300624195 (or 300624192 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 668287501011 in words is "six hundred sixty-eight billion, two hundred eighty-seven million, five hundred one thousand, eleven".