996666931 has 8 divisors (see below), whose sum is σ = 1078784784. Its totient is φ = 915327840.

The previous prime is 996666901. The next prime is 996666941. The reversal of 996666931 is 139666699.

It is a happy number.

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 996666931 - 2⁵ = 996666899 is a prime.

It is a super-2 number, since 2×996666931² = 1986689942697917522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996666901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192025 + ... + 197146.

It is an arithmetic number, because the mean of its divisors is an integer number (134848098).

Almost surely, 2^996666931 is an apocalyptic number.

996666931 is a deficient number, since it is larger than the sum of its proper divisors (82117853).

996666931 is a wasteful number, since it uses less digits than its factorization.

996666931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389381.

The product of its digits is 2834352, while the sum is 55.

The square root of 996666931 is about 31570.0321665975. The cubic root of 996666931 is about 998.8877403371.

The spelling of 996666931 in words is "nine hundred ninety-six million, six hundred sixty-six thousand, nine hundred thirty-one".