667881405831 has 32 divisors (see below), whose sum is σ = 917490534400. Its totient is φ = 431913946464.

The previous prime is 667881405799. The next prime is 667881405883. The reversal of 667881405831 is 138504188766.

It is a happy number.

It is not a de Polignac number, because 667881405831 - 2⁵ = 667881405799 is a prime.

It is a super-2 number, since 2×667881405831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667881400831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14018256 + ... + 14065818.

It is an arithmetic number, because the mean of its divisors is an integer number (28671579200).

Almost surely, 2^667881405831 is an apocalyptic number.

667881405831 is a deficient number, since it is larger than the sum of its proper divisors (249609128569).

667881405831 is a wasteful number, since it uses less digits than its factorization.

667881405831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48355.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 667881405831 in words is "six hundred sixty-seven billion, eight hundred eighty-one million, four hundred five thousand, eight hundred thirty-one".