326387661 has 16 divisors (see below), whose sum is σ = 441782400. Its totient is φ = 214315200.

The previous prime is 326387657. The next prime is 326387669. The reversal of 326387661 is 166783623.

It is not a de Polignac number, because 326387661 - 2² = 326387657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326387669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57591 + ... + 63003.

It is an arithmetic number, because the mean of its divisors is an integer number (27611400).

Almost surely, 2^326387661 is an apocalyptic number.

It is an amenable number.

326387661 is a deficient number, since it is larger than the sum of its proper divisors (115394739).

326387661 is a wasteful number, since it uses less digits than its factorization.

326387661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716.

The product of its digits is 217728, while the sum is 42.

The square root of 326387661 is about 18066.2021742258. The cubic root of 326387661 is about 688.5115720667.

The spelling of 326387661 in words is "three hundred twenty-six million, three hundred eighty-seven thousand, six hundred sixty-one".