6435666049 has 4 divisors (see below), whose sum is σ = 6435840960. Its totient is φ = 6435491140.

The previous prime is 6435666031. The next prime is 6435666053. The reversal of 6435666049 is 9406665346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6435666049 - 2³¹ = 4288182401 is a prime.

It is a super-3 number, since 3×6435666049³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6435665993 and 6435666011.

It is not an unprimeable number, because it can be changed into a prime (6435666059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8509 + ... + 113770.

It is an arithmetic number, because the mean of its divisors is an integer number (1608960240).

Almost surely, 2^6435666049 is an apocalyptic number.

It is an amenable number.

6435666049 is a deficient number, since it is larger than the sum of its proper divisors (174911).

6435666049 is a wasteful number, since it uses less digits than its factorization.

6435666049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174910.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The square root of 6435666049 is about 80222.6031053593. The cubic root of 6435666049 is about 1860.0780451508.

The spelling of 6435666049 in words is "six billion, four hundred thirty-five million, six hundred sixty-six thousand, forty-nine".