668098815 has 8 divisors (see below), whose sum is σ = 1068958128. Its totient is φ = 356319360.

The previous prime is 668098801. The next prime is 668098817. The reversal of 668098815 is 518890866.

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

It is not a de Polignac number, because 668098815 - 2⁹ = 668098303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668098817) 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, 22269946 + ... + 22269975.

It is an arithmetic number, because the mean of its divisors is an integer number (133619766).

Almost surely, 2^668098815 is an apocalyptic number.

668098815 is a deficient number, since it is larger than the sum of its proper divisors (400859313).

668098815 is a wasteful number, since it uses less digits than its factorization.

668098815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44539929.

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 668098815 is about 25847.6075295181. The cubic root of 668098815 is about 874.2055657344.

The spelling of 668098815 in words is "six hundred sixty-eight million, ninety-eight thousand, eight hundred fifteen".