944916661 has 8 divisors (see below), whose sum is σ = 1077461784. Its totient is φ = 820922880.

The previous prime is 944916653. The next prime is 944916677. The reversal of 944916661 is 166619449.

It can be written as a sum of positive squares in 4 ways, for example, as 347114161 + 597802500 = 18631^2 + 24450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 944916661 - 2³ = 944916653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (944916631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2137600 + ... + 2138041.

It is an arithmetic number, because the mean of its divisors is an integer number (134682723).

Almost surely, 2^944916661 is an apocalyptic number.

It is an amenable number.

944916661 is a deficient number, since it is larger than the sum of its proper divisors (132545123).

944916661 is a wasteful number, since it uses less digits than its factorization.

944916661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275671.

The product of its digits is 279936, while the sum is 46.

The square root of 944916661 is about 30739.4967590558. The cubic root of 944916661 is about 981.2910448651.

The spelling of 944916661 in words is "nine hundred forty-four million, nine hundred sixteen thousand, six hundred sixty-one".