66656995 has 8 divisors (see below), whose sum is σ = 80887680. Its totient is φ = 52726080.

The previous prime is 66656981. The next prime is 66656999. The reversal of 66656995 is 59965666.

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 66656995 - 2⁵ = 66656963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66656999) 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, 74451 + ... + 75340.

It is an arithmetic number, because the mean of its divisors is an integer number (10110960).

Almost surely, 2^66656995 is an apocalyptic number.

66656995 is a deficient number, since it is larger than the sum of its proper divisors (14230685).

66656995 is a wasteful number, since it uses less digits than its factorization.

66656995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149885.

The product of its digits is 2624400, while the sum is 52.

The square root of 66656995 is about 8164.3735215876. The cubic root of 66656995 is about 405.4605237465.

The spelling of 66656995 in words is "sixty-six million, six hundred fifty-six thousand, nine hundred ninety-five".