66394802 has 8 divisors (see below), whose sum is σ = 99648156. Its totient is φ = 33178752.

The previous prime is 66394763. The next prime is 66394817. The reversal of 66394802 is 20849366.

It can be written as a sum of positive squares in 2 ways, for example, as 52113961 + 14280841 = 7219^2 + 3779^2 .

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, 4343 + ... + 12314.

Almost surely, 2^66394802 is an apocalyptic number.

66394802 is a deficient number, since it is larger than the sum of its proper divisors (33253354).

66394802 is a wasteful number, since it uses less digits than its factorization.

66394802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18652.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 66394802 is about 8148.3005590123. The cubic root of 66394802 is about 404.9282035002.

The spelling of 66394802 in words is "sixty-six million, three hundred ninety-four thousand, eight hundred two".