64770565 has 8 divisors (see below), whose sum is σ = 77893920. Its totient is φ = 51703632.

The previous prime is 64770539. The next prime is 64770569. The reversal of 64770565 is 56507746.

It is a happy number.

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 64770565 - 2⁵ = 64770533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64770569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11535 + ... + 16204.

It is an arithmetic number, because the mean of its divisors is an integer number (9736740).

Almost surely, 2^64770565 is an apocalyptic number.

It is an amenable number.

64770565 is a deficient number, since it is larger than the sum of its proper divisors (13123355).

64770565 is a wasteful number, since it uses less digits than its factorization.

64770565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28211.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 64770565 is about 8048.0162151924. The cubic root of 64770565 is about 401.5989436813.

The spelling of 64770565 in words is "sixty-four million, seven hundred seventy thousand, five hundred sixty-five".