64072685 has 4 divisors (see below), whose sum is σ = 76887228. Its totient is φ = 51258144.

The previous prime is 64072681. The next prime is 64072699. The reversal of 64072685 is 58627046.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38962564 + 25110121 = 6242^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 64072685 - 2² = 64072681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64072681) 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, 6407264 + ... + 6407273.

It is an arithmetic number, because the mean of its divisors is an integer number (19221807).

Almost surely, 2^64072685 is an apocalyptic number.

It is an amenable number.

64072685 is a deficient number, since it is larger than the sum of its proper divisors (12814543).

64072685 is a wasteful number, since it uses less digits than its factorization.

64072685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12814542.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 64072685 is about 8004.5415234103. The cubic root of 64072685 is about 400.1513697941.

The spelling of 64072685 in words is "sixty-four million, seventy-two thousand, six hundred eighty-five".