44666681 has 4 divisors (see below), whose sum is σ = 44680164. Its totient is φ = 44653200.

The previous prime is 44666669. The next prime is 44666683. The reversal of 44666681 is 18666644.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 30858025 + 13808656 = 5555^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 44666681 - 2¹⁰ = 44665657 is a prime.

It is a super-2 number, since 2×44666681² = 3990224783111522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44666683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051 + ... + 9671.

It is an arithmetic number, because the mean of its divisors is an integer number (11170041).

Almost surely, 2^44666681 is an apocalyptic number.

It is an amenable number.

44666681 is a deficient number, since it is larger than the sum of its proper divisors (13483).

44666681 is an equidigital number, since it uses as much as digits as its factorization.

44666681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13482.

The product of its digits is 165888, while the sum is 41.

The square root of 44666681 is about 6683.3136242436. The cubic root of 44666681 is about 354.8089456658.

The spelling of 44666681 in words is "forty-four million, six hundred sixty-six thousand, six hundred eighty-one".