18630737237666 has 8 divisors (see below), whose sum is σ = 27946740709020. Its totient is φ = 9315157001328.

The previous prime is 18630737237647. The next prime is 18630737237677. The reversal of 18630737237666 is 66673273703681.

It can be written as a sum of positive squares in 2 ways, for example, as 18400796848225 + 229940389441 = 4289615^2 + 479521^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105698681 + ... + 105874796.

Almost surely, 2^{18630737237666} is an apocalyptic number.

18630737237666 is a deficient number, since it is larger than the sum of its proper divisors (9316003471354).

18630737237666 is a wasteful number, since it uses less digits than its factorization.

18630737237666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211617508.

The product of its (nonzero) digits is 192036096, while the sum is 65.

The spelling of 18630737237666 in words is "eighteen trillion, six hundred thirty billion, seven hundred thirty-seven million, two hundred thirty-seven thousand, six hundred sixty-six".