326672661 has 12 divisors (see below), whose sum is σ = 506676192. Its totient is φ = 186670008.

The previous prime is 326672659. The next prime is 326672669. The reversal of 326672661 is 166276623.

It is not a de Polignac number, because 326672661 - 2¹ = 326672659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326672669) by changing a digit.

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, 1110985 + ... + 1111278.

It is an arithmetic number, because the mean of its divisors is an integer number (42223016).

Almost surely, 2^326672661 is an apocalyptic number.

It is an amenable number.

326672661 is a deficient number, since it is larger than the sum of its proper divisors (180003531).

326672661 is a wasteful number, since it uses less digits than its factorization.

326672661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222280 (or 2222273 counting only the distinct ones).

The product of its digits is 108864, while the sum is 39.

The square root of 326672661 is about 18074.0881097775. The cubic root of 326672661 is about 688.7119153340.

The spelling of 326672661 in words is "three hundred twenty-six million, six hundred seventy-two thousand, six hundred sixty-one".