6434663997 has 16 divisors (see below), whose sum is σ = 8743543040. Its totient is φ = 4208473152.

The previous prime is 6434663951. The next prime is 6434664031. The reversal of 6434663997 is 7993664346.

It is not a de Polignac number, because 6434663997 - 2⁶ = 6434663933 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6434663297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49258 + ... + 123675.

It is an arithmetic number, because the mean of its divisors is an integer number (546471440).

Almost surely, 2^6434663997 is an apocalyptic number.

It is an amenable number.

6434663997 is a deficient number, since it is larger than the sum of its proper divisors (2308879043).

6434663997 is a wasteful number, since it uses less digits than its factorization.

6434663997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173172.

The product of its digits is 17635968, while the sum is 57.

The square root of 6434663997 is about 80216.3574154299. The cubic root of 6434663997 is about 1859.9815002785.

The spelling of 6434663997 in words is "six billion, four hundred thirty-four million, six hundred sixty-three thousand, nine hundred ninety-seven".