800052661 has 4 divisors (see below), whose sum is σ = 800117824. Its totient is φ = 799987500.

The previous prime is 800052607. The next prime is 800052679. The reversal of 800052661 is 166250008.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 800052661 - 2²³ = 791664053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800052601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7965 + ... + 40786.

It is an arithmetic number, because the mean of its divisors is an integer number (200029456).

Almost surely, 2^800052661 is an apocalyptic number.

It is an amenable number.

800052661 is a deficient number, since it is larger than the sum of its proper divisors (65163).

800052661 is a wasteful number, since it uses less digits than its factorization.

800052661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65162.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 800052661 is about 28285.2021558977. The cubic root of 800052661 is about 928.3381355014.

The spelling of 800052661 in words is "eight hundred million, fifty-two thousand, six hundred sixty-one".