66395995 has 8 divisors (see below), whose sum is σ = 80864784. Its totient is φ = 52323744.

The previous prime is 66395983. The next prime is 66396023. The reversal of 66395995 is 59959366.

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 66395995 - 2⁷ = 66395867 is a prime.

It is a Duffinian number.

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, 98764 + ... + 99433.

It is an arithmetic number, because the mean of its divisors is an integer number (10108098).

Almost surely, 2^66395995 is an apocalyptic number.

66395995 is a deficient number, since it is larger than the sum of its proper divisors (14468789).

66395995 is a wasteful number, since it uses less digits than its factorization.

66395995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198269.

The product of its digits is 1968300, while the sum is 52.

The square root of 66395995 is about 8148.3737641323. The cubic root of 66395995 is about 404.9306287727.

The spelling of 66395995 in words is "sixty-six million, three hundred ninety-five thousand, nine hundred ninety-five".