1666115055 has 64 divisors (see below), whose sum is σ = 3371811840. Its totient is φ = 772675200.

The previous prime is 1666115029. The next prime is 1666115117. The reversal of 1666115055 is 5505116661.

It is not a de Polignac number, because 1666115055 - 2¹⁴ = 1666098671 is a prime.

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, 9765 + ... + 58545.

It is an arithmetic number, because the mean of its divisors is an integer number (52684560).

Almost surely, 2^1666115055 is an apocalyptic number.

1666115055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1666115055 is an abundant number, since it is smaller than the sum of its proper divisors (1705696785).

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

1666115055 is a wasteful number, since it uses less digits than its factorization.

1666115055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48829 (or 48823 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1666115055 is about 40818.0726517066. The cubic root of 1666115055 is about 1185.5002854741.

The spelling of 1666115055 in words is "one billion, six hundred sixty-six million, one hundred fifteen thousand, fifty-five".