326613661 has 4 divisors (see below), whose sum is σ = 356305824. Its totient is φ = 296921500.

The previous prime is 326613653. The next prime is 326613709. The reversal of 326613661 is 166316623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 326613661 - 2³ = 326613653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326613601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14846065 + ... + 14846086.

It is an arithmetic number, because the mean of its divisors is an integer number (89076456).

Almost surely, 2^326613661 is an apocalyptic number.

It is an amenable number.

326613661 is a deficient number, since it is larger than the sum of its proper divisors (29692163).

326613661 is a wasteful number, since it uses less digits than its factorization.

326613661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29692162.

The product of its digits is 23328, while the sum is 34.

The square root of 326613661 is about 18072.4558652110. The cubic root of 326613661 is about 688.6704503301.

The spelling of 326613661 in words is "three hundred twenty-six million, six hundred thirteen thousand, six hundred sixty-one".