999667763801 has 4 divisors (see below), whose sum is σ = 1142477444352. Its totient is φ = 856858083252.

The previous prime is 999667763779. The next prime is 999667763803. The reversal of 999667763801 is 108367766999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999667763801 - 2⁶ = 999667763737 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 71404840265 + ... + 71404840278.

It is an arithmetic number, because the mean of its divisors is an integer number (285619361088).

Almost surely, 2^999667763801 is an apocalyptic number.

It is an amenable number.

999667763801 is a deficient number, since it is larger than the sum of its proper divisors (142809680551).

999667763801 is a wasteful number, since it uses less digits than its factorization.

999667763801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142809680550.

The product of its (nonzero) digits is 185177664, while the sum is 71.

The spelling of 999667763801 in words is "nine hundred ninety-nine billion, six hundred sixty-seven million, seven hundred sixty-three thousand, eight hundred one".