100666979 has 8 divisors (see below), whose sum is σ = 121815648. Its totient is φ = 81210240.

The previous prime is 100666961. The next prime is 100667011. The reversal of 100666979 is 979666001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 100666979 - 2⁸ = 100666723 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (100666919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422852 + ... + 423089.

It is an arithmetic number, because the mean of its divisors is an integer number (15226956).

Almost surely, 2^100666979 is an apocalyptic number.

100666979 is a deficient number, since it is larger than the sum of its proper divisors (21148669).

100666979 is an equidigital number, since it uses as much as digits as its factorization.

100666979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845965.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 100666979 is about 10033.2935270528. The cubic root of 100666979 is about 465.1885449604.

The spelling of 100666979 in words is "one hundred million, six hundred sixty-six thousand, nine hundred seventy-nine".