66244626 has 48 divisors (see below), whose sum is σ = 164706048. Its totient is φ = 18849600.

The previous prime is 66244609. The next prime is 66244627. The reversal of 66244626 is 62644266.

66244626 is a `hidden beast` number, since 6 + 6 + 24 + 4 + 626 = 666.

It is not an unprimeable number, because it can be changed into a prime (66244627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34471 + ... + 36341.

It is an arithmetic number, because the mean of its divisors is an integer number (3431376).

Almost surely, 2^66244626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66244626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82353024).

66244626 is an abundant number, since it is smaller than the sum of its proper divisors (98461422).

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

66244626 is a wasteful number, since it uses less digits than its factorization.

66244626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2164 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 66244626 is about 8139.0801691592. The cubic root of 66244626 is about 404.6226755467.

The spelling of 66244626 in words is "sixty-six million, two hundred forty-four thousand, six hundred twenty-six".