1666545054 has 48 divisors (see below), whose sum is σ = 3560673168. Its totient is φ = 518208768.

The previous prime is 1666544989. The next prime is 1666545079. The reversal of 1666545054 is 4505456661.

It is a junction number, because it is equal to n+sod(n) for n = 1666544997 and 1666545015.

It is a congruent number.

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, 1644652 + ... + 1645664.

It is an arithmetic number, because the mean of its divisors is an integer number (74180691).

Almost surely, 2^1666545054 is an apocalyptic number.

1666545054 is an abundant number, since it is smaller than the sum of its proper divisors (1894128114).

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

1666545054 is a wasteful number, since it uses less digits than its factorization.

1666545054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The square root of 1666545054 is about 40823.3395743170. The cubic root of 1666545054 is about 1185.6022632433.

The spelling of 1666545054 in words is "one billion, six hundred sixty-six million, five hundred forty-five thousand, fifty-four".