64726727 has 16 divisors (see below), whose sum is σ = 72969120. Its totient is φ = 57013632.

The previous prime is 64726723. The next prime is 64726751. The reversal of 64726727 is 72762746.

64726727 = 1079² + 1080² + ... + 1131².

It is not a de Polignac number, because 64726727 - 2² = 64726723 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64726723) 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 15 ways as a sum of consecutive naturals, for example, 24224 + ... + 26762.

It is an arithmetic number, because the mean of its divisors is an integer number (4560570).

Almost surely, 2^64726727 is an apocalyptic number.

64726727 is a deficient number, since it is larger than the sum of its proper divisors (8242393).

64726727 is a wasteful number, since it uses less digits than its factorization.

64726727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642.

The product of its digits is 197568, while the sum is 41.

The square root of 64726727 is about 8045.2922258921. The cubic root of 64726727 is about 401.5083198624.

The spelling of 64726727 in words is "sixty-four million, seven hundred twenty-six thousand, seven hundred twenty-seven".