66992795 has 16 divisors (see below), whose sum is σ = 82752192. Its totient is φ = 52041600.

The previous prime is 66992791. The next prime is 66992797. The reversal of 66992795 is 59729966.

It is not a de Polignac number, because 66992795 - 2² = 66992791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66992791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25514 + ... + 28016.

It is an arithmetic number, because the mean of its divisors is an integer number (5172012).

Almost surely, 2^66992795 is an apocalyptic number.

66992795 is a deficient number, since it is larger than the sum of its proper divisors (15759397).

66992795 is a wasteful number, since it uses less digits than its factorization.

66992795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662.

The product of its digits is 1837080, while the sum is 53.

The square root of 66992795 is about 8184.9126446163. The cubic root of 66992795 is about 406.1402505903.

The spelling of 66992795 in words is "sixty-six million, nine hundred ninety-two thousand, seven hundred ninety-five".