326661111690 has 32 divisors (see below), whose sum is σ = 818073046656. Its totient is φ = 83322254400.

The previous prime is 326661111671. The next prime is 326661111709. The reversal of 326661111690 is 96111166623.

It is an interprime number because it is at equal distance from previous prime (326661111671) and next prime (326661111709).

It is a super-2 number, since 2×326661111690² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 236710261 + ... + 236711640.

It is an arithmetic number, because the mean of its divisors is an integer number (25564782708).

Almost surely, 2^326661111690 is an apocalyptic number.

326661111690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

326661111690 is an abundant number, since it is smaller than the sum of its proper divisors (491411934966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

326661111690 is a wasteful number, since it uses less digits than its factorization.

326661111690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473421934.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 326661111690 in words is "three hundred twenty-six billion, six hundred sixty-one million, one hundred eleven thousand, six hundred ninety".