1666254522 has 32 divisors (see below), whose sum is σ = 3431688192. Its totient is φ = 538968384.

The previous prime is 1666254511. The next prime is 1666254547. The reversal of 1666254522 is 2254526661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75228 + ... + 94824.

It is an arithmetic number, because the mean of its divisors is an integer number (107240256).

Almost surely, 2^1666254522 is an apocalyptic number.

1666254522 is an abundant number, since it is smaller than the sum of its proper divisors (1765433670).

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

1666254522 is a wasteful number, since it uses less digits than its factorization.

1666254522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20022.

The product of its digits is 172800, while the sum is 39.

The square root of 1666254522 is about 40819.7810136213. The cubic root of 1666254522 is about 1185.5333631328.

The spelling of 1666254522 in words is "one billion, six hundred sixty-six million, two hundred fifty-four thousand, five hundred twenty-two".