6666397075 has 24 divisors (see below), whose sum is σ = 8961225056. Its totient is φ = 4890240000.

The previous prime is 6666397061. The next prime is 6666397097. The reversal of 6666397075 is 5707936666.

It is not a de Polignac number, because 6666397075 - 2²⁹ = 6129526163 is a prime.

It is a Duffinian 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, 18846 + ... + 116995.

Almost surely, 2^6666397075 is an apocalyptic number.

6666397075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6666397075 is a deficient number, since it is larger than the sum of its proper divisors (2294827981).

6666397075 is a wasteful number, since it uses less digits than its factorization.

6666397075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136015 (or 136010 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 55.

The square root of 6666397075 is about 81648.0071710265. The cubic root of 6666397075 is about 1882.0466878729.

The spelling of 6666397075 in words is "six billion, six hundred sixty-six million, three hundred ninety-seven thousand, seventy-five".