64625065 has 4 divisors (see below), whose sum is σ = 77550084. Its totient is φ = 51700048.

The previous prime is 64625053. The next prime is 64625069. The reversal of 64625065 is 56052646.

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 44049769 + 20575296 = 6637^2 + 4536^2 .

It is a cyclic number.

It is not a de Polignac number, because 64625065 - 2¹⁷ = 64493993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64625065.

It is not an unprimeable number, because it can be changed into a prime (64625069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462502 + ... + 6462511.

It is an arithmetic number, because the mean of its divisors is an integer number (19387521).

Almost surely, 2^64625065 is an apocalyptic number.

It is an amenable number.

64625065 is a deficient number, since it is larger than the sum of its proper divisors (12925019).

64625065 is a wasteful number, since it uses less digits than its factorization.

64625065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12925018.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 64625065 is about 8038.9716382134. The cubic root of 64625065 is about 401.2980021699.

The spelling of 64625065 in words is "sixty-four million, six hundred twenty-five thousand, sixty-five".