18666683702001 has 6 divisors (see below), whose sum is σ = 26962987569570. Its totient is φ = 12444455801328.

The previous prime is 18666683701997. The next prime is 18666683702021. The reversal of 18666683702001 is 10020738666681.

It can be written as a sum of positive squares in only one way, i.e., 18488495030625 + 178188671376 = 4299825^2 + 422124^2 .

It is not a de Polignac number, because 18666683702001 - 2² = 18666683701997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18666683702021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1037037983436 + ... + 1037037983453.

It is an arithmetic number, because the mean of its divisors is an integer number (4493831261595).

Almost surely, 2^{18666683702001} is an apocalyptic number.

It is an amenable number.

18666683702001 is a deficient number, since it is larger than the sum of its proper divisors (8296303867569).

18666683702001 is a wasteful number, since it uses less digits than its factorization.

18666683702001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074075966895 (or 2074075966892 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 18666683702001 in words is "eighteen trillion, six hundred sixty-six billion, six hundred eighty-three million, seven hundred two thousand, one".