44005000661 has 2 divisors, whose sum is σ = 44005000662. Its totient is φ = 44005000660.

The previous prime is 44005000651. The next prime is 44005000709. The reversal of 44005000661 is 16600050044.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43293124900 + 711875761 = 208070^2 + 26681^2 .

It is a cyclic number.

It is not a de Polignac number, because 44005000661 - 2¹⁸ = 44004738517 is a prime.

It is a super-2 number, since 2×44005000661² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44005000661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44005000651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22002500330 + 22002500331.

It is an arithmetic number, because the mean of its divisors is an integer number (22002500331).

Almost surely, 2^44005000661 is an apocalyptic number.

It is an amenable number.

44005000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44005000661 is an equidigital number, since it uses as much as digits as its factorization.

44005000661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 44005000661 in words is "forty-four billion, five million, six hundred sixty-one", and thus it is an aban number.