66904202 has 8 divisors (see below), whose sum is σ = 100476516. Its totient is φ = 33412032.

The previous prime is 66904199. The next prime is 66904213. The reversal of 66904202 is 20240966.

It can be written as a sum of positive squares in 2 ways, for example, as 52983841 + 13920361 = 7279^2 + 3731^2 .

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

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, 17903 + ... + 21314.

Almost surely, 2^66904202 is an apocalyptic number.

66904202 is a deficient number, since it is larger than the sum of its proper divisors (33572314).

66904202 is a wasteful number, since it uses less digits than its factorization.

66904202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40072.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 66904202 is about 8179.4988844061. The cubic root of 66904202 is about 405.9611415000.

The spelling of 66904202 in words is "sixty-six million, nine hundred four thousand, two hundred two".