44721666 has 32 divisors (see below), whose sum is σ = 108417600. Its totient is φ = 13551840.

The previous prime is 44721659. The next prime is 44721667. The reversal of 44721666 is 66612744.

It is a super-3 number, since 3×44721666³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44721666.

It is not an unprimeable number, because it can be changed into a prime (44721667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37051 + ... + 38238.

It is an arithmetic number, because the mean of its divisors is an integer number (3388050).

Almost surely, 2^44721666 is an apocalyptic number.

44721666 is an abundant number, since it is smaller than the sum of its proper divisors (63695934).

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

44721666 is a wasteful number, since it uses less digits than its factorization.

44721666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75311 (or 75305 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 44721666 is about 6687.4259622070. The cubic root of 44721666 is about 354.9544767388.

The spelling of 44721666 in words is "forty-four million, seven hundred twenty-one thousand, six hundred sixty-six".