44591661 has 16 divisors (see below), whose sum is σ = 66182400. Its totient is φ = 29673504.

The previous prime is 44591633. The next prime is 44591683. The reversal of 44591661 is 16619544.

44591661 is a `hidden beast` number, since 4 + 4 + 591 + 6 + 61 = 666.

It is not a de Polignac number, because 44591661 - 2⁶ = 44591597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44591161) 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, 18265 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (4136400).

Almost surely, 2^44591661 is an apocalyptic number.

It is an amenable number.

44591661 is a deficient number, since it is larger than the sum of its proper divisors (21590739).

44591661 is a wasteful number, since it uses less digits than its factorization.

44591661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025 (or 3019 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 44591661 is about 6677.6987802685. The cubic root of 44591661 is about 354.6101943639.

The spelling of 44591661 in words is "forty-four million, five hundred ninety-one thousand, six hundred sixty-one".