66386995 has 16 divisors (see below), whose sum is σ = 82383840. Its totient is φ = 51321600.

The previous prime is 66386981. The next prime is 66387031. The reversal of 66386995 is 59968366.

It is a happy number.

It is not a de Polignac number, because 66386995 - 2⁵ = 66386963 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20860 + ... + 23830.

It is an arithmetic number, because the mean of its divisors is an integer number (5148990).

Almost surely, 2^66386995 is an apocalyptic number.

66386995 is a deficient number, since it is larger than the sum of its proper divisors (15996845).

66386995 is a wasteful number, since it uses less digits than its factorization.

66386995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126.

The product of its digits is 2099520, while the sum is 52.

The square root of 66386995 is about 8147.8214879807. The cubic root of 66386995 is about 404.9123317838.

The spelling of 66386995 in words is "sixty-six million, three hundred eighty-six thousand, nine hundred ninety-five".