666023622 has 32 divisors (see below), whose sum is σ = 1455442560. Its totient is φ = 201505920.

The previous prime is 666023563. The next prime is 666023653. The reversal of 666023622 is 226320666.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 35838 + ... + 51150.

It is an arithmetic number, because the mean of its divisors is an integer number (45482580).

Almost surely, 2^666023622 is an apocalyptic number.

666023622 is an abundant number, since it is smaller than the sum of its proper divisors (789418938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666023622 is a wasteful number, since it uses less digits than its factorization.

666023622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15988.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 666023622 is about 25807.4334640235. The cubic root of 666023622 is about 873.2994987507.

The spelling of 666023622 in words is "six hundred sixty-six million, twenty-three thousand, six hundred twenty-two".