321360660 has 36 divisors (see below), whose sum is σ = 974794548. Its totient is φ = 85696128.

The previous prime is 321360649. The next prime is 321360671. The reversal of 321360660 is 66063123.

321360660 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (321360649) and next prime (321360671).

It can be written as a sum of positive squares in 2 ways, for example, as 253000836 + 68359824 = 15906^2 + 8268^2 .

It is a tau number, because it is divible by the number of its divisors (36).

321360660 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 892489 + ... + 892848.

Almost surely, 2^321360660 is an apocalyptic number.

321360660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321360660 is an abundant number, since it is smaller than the sum of its proper divisors (653433888).

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

321360660 is a wasteful number, since it uses less digits than its factorization.

321360660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785352 (or 1785347 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 321360660 is about 17926.5350807121. The cubic root of 321360660 is about 684.9584644572.

The spelling of 321360660 in words is "three hundred twenty-one million, three hundred sixty thousand, six hundred sixty".