100660399 has 8 divisors (see below), whose sum is σ = 115108128. Its totient is φ = 86229600.

The previous prime is 100660381. The next prime is 100660403. The reversal of 100660399 is 993066001.

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 100660399 - 2⁹ = 100659887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100660319) 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, 13449 + ... + 19549.

It is an arithmetic number, because the mean of its divisors is an integer number (14388516).

Almost surely, 2^100660399 is an apocalyptic number.

100660399 is a deficient number, since it is larger than the sum of its proper divisors (14447729).

100660399 is an equidigital number, since it uses as much as digits as its factorization.

100660399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 100660399 is about 10032.9656134166. The cubic root of 100660399 is about 465.1784092060.

The spelling of 100660399 in words is "one hundred million, six hundred sixty thousand, three hundred ninety-nine".