6746428557 has 24 divisors (see below), whose sum is σ = 10676397888. Its totient is φ = 4071182400.

The previous prime is 6746428519. The next prime is 6746428567. The reversal of 6746428557 is 7558246476.

It is a happy number.

6746428557 is a `hidden beast` number, since 6 + 7 + 4 + 64 + 28 + 557 = 666.

It is not a de Polignac number, because 6746428557 - 2⁸ = 6746428301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6746428567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123169 + ... + 169302.

It is an arithmetic number, because the mean of its divisors is an integer number (444849912).

Almost surely, 2^6746428557 is an apocalyptic number.

It is an amenable number.

6746428557 is a deficient number, since it is larger than the sum of its proper divisors (3929969331).

6746428557 is a wasteful number, since it uses less digits than its factorization.

6746428557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292721 (or 292718 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The square root of 6746428557 is about 82136.6456400552. The cubic root of 6746428557 is about 1889.5482022456.

The spelling of 6746428557 in words is "six billion, seven hundred forty-six million, four hundred twenty-eight thousand, five hundred fifty-seven".