64775567 has 16 divisors (see below), whose sum is σ = 70187520. Its totient is φ = 59618592.

The previous prime is 64775551. The next prime is 64775591. The reversal of 64775567 is 76557746.

It is a cyclic number.

It is not a de Polignac number, because 64775567 - 2⁴ = 64775551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64775507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87284 + ... + 88022.

It is an arithmetic number, because the mean of its divisors is an integer number (4386720).

Almost surely, 2^64775567 is an apocalyptic number.

64775567 is a deficient number, since it is larger than the sum of its proper divisors (5411953).

64775567 is a wasteful number, since it uses less digits than its factorization.

64775567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its digits is 1234800, while the sum is 47.

The square root of 64775567 is about 8048.3269690042. The cubic root of 64775567 is about 401.6092814338.

The spelling of 64775567 in words is "sixty-four million, seven hundred seventy-five thousand, five hundred sixty-seven".