802144661 has 4 divisors (see below), whose sum is σ = 820799232. Its totient is φ = 783490092.

The previous prime is 802144657. The next prime is 802144687. The reversal of 802144661 is 166441208.

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 802144661 - 2² = 802144657 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 (802144601) 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, 9327221 + ... + 9327306.

It is an arithmetic number, because the mean of its divisors is an integer number (205199808).

Almost surely, 2^802144661 is an apocalyptic number.

It is an amenable number.

802144661 is a deficient number, since it is larger than the sum of its proper divisors (18654571).

802144661 is a wasteful number, since it uses less digits than its factorization.

802144661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18654570.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 802144661 is about 28322.1584805961. The cubic root of 802144661 is about 929.1465794080.

Adding to 802144661 its reverse (166441208), we get a palindrome (968585869).

The spelling of 802144661 in words is "eight hundred two million, one hundred forty-four thousand, six hundred sixty-one".