66108398 has 8 divisors (see below), whose sum is σ = 99236280. Its totient is φ = 33029640.

The previous prime is 66108349. The next prime is 66108401. The reversal of 66108398 is 89380166.

It is a happy number.

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

It is a super-2 number, since 2×66108398² = 8740640572252808, which contains 22 as substring.

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, 8708 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (12404535).

Almost surely, 2^66108398 is an apocalyptic number.

66108398 is a deficient number, since it is larger than the sum of its proper divisors (33127882).

66108398 is a wasteful number, since it uses less digits than its factorization.

66108398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24562.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 66108398 is about 8130.7071033213. The cubic root of 66108398 is about 404.3451246535.

The spelling of 66108398 in words is "sixty-six million, one hundred eight thousand, three hundred ninety-eight".