66994835 has 8 divisors (see below), whose sum is σ = 80485920. Its totient is φ = 53534464.

The previous prime is 66994831. The next prime is 66994847. The reversal of 66994835 is 53849966.

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

It is a cyclic number.

It is not a de Polignac number, because 66994835 - 2² = 66994831 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66994831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2567 + ... + 11856.

It is an arithmetic number, because the mean of its divisors is an integer number (10060740).

Almost surely, 2^66994835 is an apocalyptic number.

66994835 is a deficient number, since it is larger than the sum of its proper divisors (13491085).

66994835 is a wasteful number, since it uses less digits than its factorization.

66994835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15357.

The product of its digits is 1399680, while the sum is 50.

The square root of 66994835 is about 8185.0372632017. The cubic root of 66994835 is about 406.1443730122.

The spelling of 66994835 in words is "sixty-six million, nine hundred ninety-four thousand, eight hundred thirty-five".