326706665 has 4 divisors (see below), whose sum is σ = 392048004. Its totient is φ = 261365328.

The previous prime is 326706661. The next prime is 326706671. The reversal of 326706665 is 566607623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105411289 + 221295376 = 10267^2 + 14876^2 .

It is a cyclic number.

It is not a de Polignac number, because 326706665 - 2² = 326706661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326706661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32670662 + ... + 32670671.

It is an arithmetic number, because the mean of its divisors is an integer number (98012001).

Almost surely, 2^326706665 is an apocalyptic number.

It is an amenable number.

326706665 is a deficient number, since it is larger than the sum of its proper divisors (65341339).

326706665 is an equidigital number, since it uses as much as digits as its factorization.

326706665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65341338.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 326706665 is about 18075.0287689951. The cubic root of 326706665 is about 688.7358109644.

The spelling of 326706665 in words is "three hundred twenty-six million, seven hundred six thousand, six hundred sixty-five".