328210661 has 8 divisors (see below), whose sum is σ = 340351200. Its totient is φ = 316125040.

The previous prime is 328210643. The next prime is 328210691. The reversal of 328210661 is 166012823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328210661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328210691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355 + ... + 25656.

It is an arithmetic number, because the mean of its divisors is an integer number (42543900).

Almost surely, 2^328210661 is an apocalyptic number.

It is an amenable number.

328210661 is a deficient number, since it is larger than the sum of its proper divisors (12140539).

328210661 is a wasteful number, since it uses less digits than its factorization.

328210661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27459.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 328210661 is about 18116.5852466738. The cubic root of 328210661 is about 689.7910597502.

The spelling of 328210661 in words is "three hundred twenty-eight million, two hundred ten thousand, six hundred sixty-one".