6666458794 has 16 divisors (see below), whose sum is σ = 10272327048. Its totient is φ = 3242391552.

The previous prime is 6666458789. The next prime is 6666458801. The reversal of 6666458794 is 4978546666.

It can be written as a sum of positive squares in 4 ways, for example, as 6646325625 + 20133169 = 81525^2 + 4487^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444994 + ... + 459730.

Almost surely, 2^6666458794 is an apocalyptic number.

6666458794 is a deficient number, since it is larger than the sum of its proper divisors (3605868254).

6666458794 is a wasteful number, since it uses less digits than its factorization.

6666458794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20889.

The product of its digits is 52254720, while the sum is 61.

The square root of 6666458794 is about 81648.3851279375. The cubic root of 6666458794 is about 1882.0524959919.

The spelling of 6666458794 in words is "six billion, six hundred sixty-six million, four hundred fifty-eight thousand, seven hundred ninety-four".