6497018666 has 8 divisors (see below), whose sum is σ = 9746858304. Its totient is φ = 3248065900.

The previous prime is 6497018597. The next prime is 6497018681. The reversal of 6497018666 is 6668107946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6497018666² = 84422503092704839112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203090 + ... + 232893.

It is an arithmetic number, because the mean of its divisors is an integer number (1218357288).

Almost surely, 2^6497018666 is an apocalyptic number.

6497018666 is a deficient number, since it is larger than the sum of its proper divisors (3249839638).

6497018666 is a wasteful number, since it uses less digits than its factorization.

6497018666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443436.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 6497018666 is about 80604.0859138046. The cubic root of 6497018666 is about 1865.9702049682.

The spelling of 6497018666 in words is "six billion, four hundred ninety-seven million, eighteen thousand, six hundred sixty-six".