66199402 has 16 divisors (see below), whose sum is σ = 103692960. Its totient is φ = 31656688.

The previous prime is 66199361. The next prime is 66199421. The reversal of 66199402 is 20499166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873 + ... + 11539.

It is an arithmetic number, because the mean of its divisors is an integer number (6480810).

Almost surely, 2^66199402 is an apocalyptic number.

66199402 is a deficient number, since it is larger than the sum of its proper divisors (37493558).

66199402 is a wasteful number, since it uses less digits than its factorization.

66199402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 66199402 is about 8136.3014939222. The cubic root of 66199402 is about 404.5305784080.

The spelling of 66199402 in words is "sixty-six million, one hundred ninety-nine thousand, four hundred two".