102668815 has 4 divisors (see below), whose sum is σ = 123202584. Its totient is φ = 82135048.

The previous prime is 102668801. The next prime is 102668843. The reversal of 102668815 is 518866201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102668815 is a prime.

It is a super-4 number, since 4×102668815⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

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, 10266877 + ... + 10266886.

It is an arithmetic number, because the mean of its divisors is an integer number (30800646).

Almost surely, 2^102668815 is an apocalyptic number.

102668815 is a deficient number, since it is larger than the sum of its proper divisors (20533769).

102668815 is an equidigital number, since it uses as much as digits as its factorization.

102668815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20533768.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 102668815 is about 10132.5621142927. The cubic root of 102668815 is about 468.2518657307.

The spelling of 102668815 in words is "one hundred two million, six hundred sixty-eight thousand, eight hundred fifteen".