1666055001915 has 24 divisors (see below), whose sum is σ = 2896009515360. Its totient is φ = 886045484544.

The previous prime is 1666055001901. The next prime is 1666055001937. The reversal of 1666055001915 is 5191005506661.

It is not a de Polignac number, because 1666055001915 - 2¹³ = 1666054993723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52425255 + ... + 52457024.

It is an arithmetic number, because the mean of its divisors is an integer number (120667063140).

Almost surely, 2^{1666055001915} is an apocalyptic number.

1666055001915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1666055001915 is a deficient number, since it is larger than the sum of its proper divisors (1229954513445).

1666055001915 is a wasteful number, since it uses less digits than its factorization.

1666055001915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104882643 (or 104882640 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The spelling of 1666055001915 in words is "one trillion, six hundred sixty-six billion, fifty-five million, one thousand, nine hundred fifteen".