6406772257 has 8 divisors (see below), whose sum is σ = 6535238400. Its totient is φ = 6279490464.

The previous prime is 6406772231. The next prime is 6406772261. The reversal of 6406772257 is 7522776046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6406772257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406772227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285157 + ... + 306802.

It is an arithmetic number, because the mean of its divisors is an integer number (816904800).

Almost surely, 2^6406772257 is an apocalyptic number.

It is an amenable number.

6406772257 is a deficient number, since it is larger than the sum of its proper divisors (128466143).

6406772257 is a wasteful number, since it uses less digits than its factorization.

6406772257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592175.

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 6406772257 is about 80042.3154150353. The cubic root of 6406772257 is about 1857.2901782684.

The spelling of 6406772257 in words is "six billion, four hundred six million, seven hundred seventy-two thousand, two hundred fifty-seven".