66222995 has 12 divisors (see below), whose sum is σ = 81463440. Its totient is φ = 51679680.

The previous prime is 66222991. The next prime is 66223009. The reversal of 66222995 is 59922266.

It is not a de Polignac number, because 66222995 - 2² = 66222991 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66222991) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4466 + ... + 12344.

It is an arithmetic number, because the mean of its divisors is an integer number (6788620).

Almost surely, 2^66222995 is an apocalyptic number.

66222995 is a deficient number, since it is larger than the sum of its proper divisors (15240445).

66222995 is an equidigital number, since it uses as much as digits as its factorization.

66222995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966 (or 7925 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 66222995 is about 8137.7512250007. The cubic root of 66222995 is about 404.5786299818.

The spelling of 66222995 in words is "sixty-six million, two hundred twenty-two thousand, nine hundred ninety-five".