18615211066 has 8 divisors (see below), whose sum is σ = 27926291124. Its totient is φ = 9306447360.

The previous prime is 18615211003. The next prime is 18615211067. The reversal of 18615211066 is 66011251681.

It can be written as a sum of positive squares in 2 ways, for example, as 18420189841 + 195021225 = 135721^2 + 13965^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18615211067) 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, 558855 + ... + 591226.

Almost surely, 2^18615211066 is an apocalyptic number.

18615211066 is a deficient number, since it is larger than the sum of its proper divisors (9311080058).

18615211066 is a wasteful number, since it uses less digits than its factorization.

18615211066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158176.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 18615211066 in words is "eighteen billion, six hundred fifteen million, two hundred eleven thousand, sixty-six".