66199398 has 8 divisors (see below), whose sum is σ = 132398808. Its totient is φ = 22066464.

The previous prime is 66199361. The next prime is 66199421. The reversal of 66199398 is 89399166.

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

66199398 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66199398.

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, 5516611 + ... + 5516622.

It is an arithmetic number, because the mean of its divisors is an integer number (16549851).

Almost surely, 2^66199398 is an apocalyptic number.

66199398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66199398 is a wasteful number, since it uses less digits than its factorization.

66199398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11033238.

The product of its digits is 629856, while the sum is 51.

The square root of 66199398 is about 8136.3012481102. The cubic root of 66199398 is about 404.5305702603.

The spelling of 66199398 in words is "sixty-six million, one hundred ninety-nine thousand, three hundred ninety-eight".