999667763802 has 24 divisors (see below), whose sum is σ = 2293355458836. Its totient is φ = 313621259136.

The previous prime is 999667763779. The next prime is 999667763803. The reversal of 999667763802 is 208367766999.

999667763802 is a `hidden beast` number, since 99 + 96 + 6 + 7 + 76 + 380 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 997743274641 + 1924489161 = 998871^2 + 43869^2 .

It is a super-2 number, since 2×999667763802² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999667763803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1633443753 + ... + 1633444364.

Almost surely, 2^999667763802 is an apocalyptic number.

999667763802 is an abundant number, since it is smaller than the sum of its proper divisors (1293687695034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999667763802 is a wasteful number, since it uses less digits than its factorization.

999667763802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266888142 (or 3266888139 counting only the distinct ones).

The product of its (nonzero) digits is 370355328, while the sum is 72.

The spelling of 999667763802 in words is "nine hundred ninety-nine billion, six hundred sixty-seven million, seven hundred sixty-three thousand, eight hundred two".