799217664 has 96 divisors (see below), whose sum is σ = 2435247360. Its totient is φ = 228335616.

The previous prime is 799217663. The next prime is 799217681. The reversal of 799217664 is 466712997.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799217663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33717 + ... + 52299.

It is an arithmetic number, because the mean of its divisors is an integer number (25367160).

Almost surely, 2^799217664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 799217664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217623680).

799217664 is an abundant number, since it is smaller than the sum of its proper divisors (1636029696).

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

799217664 is a wasteful number, since it uses less digits than its factorization.

799217664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18615 (or 18595 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 799217664 is about 28270.4379874101. The cubic root of 799217664 is about 928.0150611904.

The spelling of 799217664 in words is "seven hundred ninety-nine million, two hundred seventeen thousand, six hundred sixty-four".