66196995 has 32 divisors (see below), whose sum is σ = 112147200. Its totient is φ = 33285504.

The previous prime is 66196993. The next prime is 66197003. The reversal of 66196995 is 59969166.

It is not a de Polignac number, because 66196995 - 2¹ = 66196993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66196993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16936 + ... + 20474.

It is an arithmetic number, because the mean of its divisors is an integer number (3504600).

Almost surely, 2^66196995 is an apocalyptic number.

66196995 is a deficient number, since it is larger than the sum of its proper divisors (45950205).

66196995 is a wasteful number, since it uses less digits than its factorization.

66196995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619.

The product of its digits is 787320, while the sum is 51.

The square root of 66196995 is about 8136.1535752467. The cubic root of 66196995 is about 404.5256754589.

The spelling of 66196995 in words is "sixty-six million, one hundred ninety-six thousand, nine hundred ninety-five".