6497666623 has 6 divisors (see below), whose sum is σ = 7426148456. Its totient is φ = 5569245732.

The previous prime is 6497666603. The next prime is 6497666629. The reversal of 6497666623 is 3266667946.

It is not a de Polignac number, because 6497666623 - 2²⁵ = 6464112191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497666629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198036 + ... + 228502.

Almost surely, 2^6497666623 is an apocalyptic number.

6497666623 is a deficient number, since it is larger than the sum of its proper divisors (928481833).

6497666623 is an frugal number, since it uses more digits than its factorization.

6497666623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60941 (or 30474 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 55.

The square root of 6497666623 is about 80608.1051942049. The cubic root of 6497666623 is about 1866.0322348687.

The spelling of 6497666623 in words is "six billion, four hundred ninety-seven million, six hundred sixty-six thousand, six hundred twenty-three".