666131532838 has 8 divisors (see below), whose sum is σ = 1057973611032. Its totient is φ = 313473662496.

The previous prime is 666131532827. The next prime is 666131532887. The reversal of 666131532838 is 838235131666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×666131532838² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9796051920 + ... + 9796051987.

It is an arithmetic number, because the mean of its divisors is an integer number (132246701379).

Almost surely, 2^666131532838 is an apocalyptic number.

666131532838 is a deficient number, since it is larger than the sum of its proper divisors (391842078194).

666131532838 is a wasteful number, since it uses less digits than its factorization.

666131532838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19592103926.

The product of its digits is 3732480, while the sum is 52.

The spelling of 666131532838 in words is "six hundred sixty-six billion, one hundred thirty-one million, five hundred thirty-two thousand, eight hundred thirty-eight".