66622245 has 8 divisors (see below), whose sum is σ = 106595616. Its totient is φ = 35531856.

The previous prime is 66622243. The next prime is 66622247. The reversal of 66622245 is 54222666.

It is an interprime number because it is at equal distance from previous prime (66622243) and next prime (66622247).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66622245 - 2¹ = 66622243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66622243) 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, 2220727 + ... + 2220756.

It is an arithmetic number, because the mean of its divisors is an integer number (13324452).

Almost surely, 2^66622245 is an apocalyptic number.

It is an amenable number.

66622245 is a deficient number, since it is larger than the sum of its proper divisors (39973371).

66622245 is a wasteful number, since it uses less digits than its factorization.

66622245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441491.

The product of its digits is 34560, while the sum is 33.

The square root of 66622245 is about 8162.2450955604. The cubic root of 66622245 is about 405.3900525111.

The spelling of 66622245 in words is "sixty-six million, six hundred twenty-two thousand, two hundred forty-five".