18155076966 has 128 divisors (see below), whose sum is σ = 44934704640. Its totient is φ = 5398233984.

The previous prime is 18155076931. The next prime is 18155076983. The reversal of 18155076966 is 66967055181.

18155076966 is a `hidden beast` number, since 1 + 8 + 15 + 507 + 69 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2489161 + ... + 2496443.

It is an arithmetic number, because the mean of its divisors is an integer number (351052380).

Almost surely, 2^18155076966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18155076966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22467352320).

18155076966 is an abundant number, since it is smaller than the sum of its proper divisors (26779627674).

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

18155076966 is a wasteful number, since it uses less digits than its factorization.

18155076966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427 (or 7421 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 18155076966 in words is "eighteen billion, one hundred fifty-five million, seventy-six thousand, nine hundred sixty-six".