66504994 has 8 divisors (see below), whose sum is σ = 100690128. Its totient is φ = 32941620.

The previous prime is 66504989. The next prime is 66505001. The reversal of 66504994 is 49940566.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66504994.

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, 155172 + ... + 155599.

It is an arithmetic number, because the mean of its divisors is an integer number (12586266).

Almost surely, 2^66504994 is an apocalyptic number.

66504994 is a deficient number, since it is larger than the sum of its proper divisors (34185134).

66504994 is a wasteful number, since it uses less digits than its factorization.

66504994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310880.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 66504994 is about 8155.0594111876. The cubic root of 66504994 is about 405.1520924472.

The spelling of 66504994 in words is "sixty-six million, five hundred four thousand, nine hundred ninety-four".