666879479087 has 6 divisors (see below), whose sum is σ = 676981467288. Its totient is φ = 656926049604.

The previous prime is 666879479023. The next prime is 666879479111. The reversal of 666879479087 is 780974978666.

It is not a de Polignac number, because 666879479087 - 2⁶ = 666879479023 is a prime.

It is a super-3 number, since 3×666879479087³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666879478999 and 666879479017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666879472087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74274803 + ... + 74283780.

It is an arithmetic number, because the mean of its divisors is an integer number (112830244548).

Almost surely, 2^666879479087 is an apocalyptic number.

666879479087 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

666879479087 is a deficient number, since it is larger than the sum of its proper divisors (10101988201).

666879479087 is an equidigital number, since it uses as much as digits as its factorization.

666879479087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148558717 (or 148558650 counting only the distinct ones).

The product of its (nonzero) digits is 1536288768, while the sum is 77.

The spelling of 666879479087 in words is "six hundred sixty-six billion, eight hundred seventy-nine million, four hundred seventy-nine thousand, eighty-seven".