64511065 has 8 divisors (see below), whose sum is σ = 77476680. Its totient is φ = 51566592.

The previous prime is 64511059. The next prime is 64511071. The reversal of 64511065 is 56011546.

It is an interprime number because it is at equal distance from previous prime (64511059) and next prime (64511071).

It can be written as a sum of positive squares in 4 ways, for example, as 3108169 + 61402896 = 1763^2 + 7836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64511065 - 2⁵ = 64511033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2467 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (9684585).

Almost surely, 2^64511065 is an apocalyptic number.

It is an amenable number.

64511065 is a deficient number, since it is larger than the sum of its proper divisors (12965615).

64511065 is a wasteful number, since it uses less digits than its factorization.

64511065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10571.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 64511065 is about 8031.8780493730. The cubic root of 64511065 is about 401.0618971913.

The spelling of 64511065 in words is "sixty-four million, five hundred eleven thousand, sixty-five".