326560661 has 8 divisors (see below), whose sum is σ = 373336320. Its totient is φ = 279816048.

The previous prime is 326560649. The next prime is 326560673. The reversal of 326560661 is 166065623.

It is an interprime number because it is at equal distance from previous prime (326560649) and next prime (326560673).

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

It is a cyclic number.

It is not a de Polignac number, because 326560661 - 2²² = 322366357 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 (326562661) 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, 22835 + ... + 34271.

It is an arithmetic number, because the mean of its divisors is an integer number (46667040).

Almost surely, 2^326560661 is an apocalyptic number.

It is an amenable number.

326560661 is a deficient number, since it is larger than the sum of its proper divisors (46775659).

326560661 is a wasteful number, since it uses less digits than its factorization.

326560661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15523.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 326560661 is about 18070.9894859136. The cubic root of 326560661 is about 688.6331978483.

The spelling of 326560661 in words is "three hundred twenty-six million, five hundred sixty thousand, six hundred sixty-one".