64678743 has 10 divisors (see below), whose sum is σ = 96618984. Its totient is φ = 43119108.

The previous prime is 64678723. The next prime is 64678759. The reversal of 64678743 is 34787646.

It is not a de Polignac number, because 64678743 - 2⁸ = 64678487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64678723) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 399171 + ... + 399332.

Almost surely, 2^64678743 is an apocalyptic number.

64678743 is a deficient number, since it is larger than the sum of its proper divisors (31940241).

64678743 is an equidigital number, since it uses as much as digits as its factorization.

64678743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798515 (or 798506 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 64678743 is about 8042.3095563401. The cubic root of 64678743 is about 401.4090783337.

The spelling of 64678743 in words is "sixty-four million, six hundred seventy-eight thousand, seven hundred forty-three".