321466661 has 4 divisors (see below), whose sum is σ = 321559392. Its totient is φ = 321373932.

The previous prime is 321466601. The next prime is 321466703. The reversal of 321466661 is 166664123.

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 321466661 - 2⁶ = 321466597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321466601) 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, 40955 + ... + 48168.

It is an arithmetic number, because the mean of its divisors is an integer number (80389848).

Almost surely, 2^321466661 is an apocalyptic number.

It is an amenable number.

321466661 is a deficient number, since it is larger than the sum of its proper divisors (92731).

321466661 is an equidigital number, since it uses as much as digits as its factorization.

321466661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92730.

The product of its digits is 31104, while the sum is 35.

The square root of 321466661 is about 17929.4913759426. The cubic root of 321466661 is about 685.0337674937.

The spelling of 321466661 in words is "three hundred twenty-one million, four hundred sixty-six thousand, six hundred sixty-one".