18330058661 has 4 divisors (see below), whose sum is σ = 18562084800. Its totient is φ = 18098032524.

The previous prime is 18330058601. The next prime is 18330058673. The reversal of 18330058661 is 16685003381.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16685003381 = 50957 ⋅327433.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18330058661 is a prime.

It is a super-2 number, since 2×18330058661² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18330058601) 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, 116012951 + ... + 116013108.

It is an arithmetic number, because the mean of its divisors is an integer number (4640521200).

Almost surely, 2^18330058661 is an apocalyptic number.

It is an amenable number.

18330058661 is a deficient number, since it is larger than the sum of its proper divisors (232026139).

18330058661 is an equidigital number, since it uses as much as digits as its factorization.

18330058661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232026138.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 18330058661 in words is "eighteen billion, three hundred thirty million, fifty-eight thousand, six hundred sixty-one".