994836661 has 12 divisors (see below), whose sum is σ = 1246279692. Its totient is φ = 787123008.

The previous prime is 994836643. The next prime is 994836697. The reversal of 994836661 is 166638499.

It can be written as a sum of positive squares in 2 ways, for example, as 60372900 + 934463761 = 7770^2 + 30569^2 .

It is not a de Polignac number, because 994836661 - 2⁷ = 994836533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 994836599 and 994836608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994836611) 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 11 ways as a sum of consecutive naturals, for example, 780240 + ... + 781513.

It is an arithmetic number, because the mean of its divisors is an integer number (103856641).

Almost surely, 2^994836661 is an apocalyptic number.

994836661 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

994836661 is a deficient number, since it is larger than the sum of its proper divisors (251443031).

994836661 is a wasteful number, since it uses less digits than its factorization.

994836661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561780 (or 1561773 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The square root of 994836661 is about 31541.0313877020. The cubic root of 994836661 is about 998.2759162435.

The spelling of 994836661 in words is "nine hundred ninety-four million, eight hundred thirty-six thousand, six hundred sixty-one".