996979665 has 32 divisors (see below), whose sum is σ = 1745214336. Its totient is φ = 481986560.

The previous prime is 996979663. The next prime is 996979717. The reversal of 996979665 is 566979699.

It is not a de Polignac number, because 996979665 - 2¹ = 996979663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 996979596 and 996979605.

It is not an unprimeable number, because it can be changed into a prime (996979663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49687 + ... + 66803.

It is an arithmetic number, because the mean of its divisors is an integer number (54537948).

Almost surely, 2^996979665 is an apocalyptic number.

It is an amenable number.

996979665 is a deficient number, since it is larger than the sum of its proper divisors (748234671).

996979665 is a wasteful number, since it uses less digits than its factorization.

996979665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17489.

The product of its digits is 49601160, while the sum is 66.

The square root of 996979665 is about 31574.9847980961. The cubic root of 996979665 is about 998.9922063598.

The spelling of 996979665 in words is "nine hundred ninety-six million, nine hundred seventy-nine thousand, six hundred sixty-five".