321276664 has 8 divisors (see below), whose sum is σ = 602393760. Its totient is φ = 160638328.

The previous prime is 321276623. The next prime is 321276667. The reversal of 321276664 is 466672123.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321276667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20079784 + ... + 20079799.

It is an arithmetic number, because the mean of its divisors is an integer number (75299220).

Almost surely, 2^321276664 is an apocalyptic number.

It is an amenable number.

321276664 is a deficient number, since it is larger than the sum of its proper divisors (281117096).

321276664 is a wasteful number, since it uses less digits than its factorization.

321276664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159589 (or 40159585 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 321276664 is about 17924.1921435807. The cubic root of 321276664 is about 684.8987819968.

The spelling of 321276664 in words is "three hundred twenty-one million, two hundred seventy-six thousand, six hundred sixty-four".