66785995 has 8 divisors (see below), whose sum is σ = 80220960. Its totient is φ = 53376960.

The previous prime is 66785987. The next prime is 66786017. The reversal of 66785995 is 59958766.

It is a happy number.

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

It is not a de Polignac number, because 66785995 - 2³ = 66785987 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271 + ... + 11560.

It is an arithmetic number, because the mean of its divisors is an integer number (10027620).

Almost surely, 2^66785995 is an apocalyptic number.

66785995 is a deficient number, since it is larger than the sum of its proper divisors (13434965).

66785995 is a wasteful number, since it uses less digits than its factorization.

66785995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965.

The product of its digits is 4082400, while the sum is 55.

The square root of 66785995 is about 8172.2698805167. The cubic root of 66785995 is about 405.7219151806.

The spelling of 66785995 in words is "sixty-six million, seven hundred eighty-five thousand, nine hundred ninety-five".