64270665 has 40 divisors (see below), whose sum is σ = 118352520. Its totient is φ = 33343488.

The previous prime is 64270663. The next prime is 64270709. The reversal of 64270665 is 56607246.

64270665 is a `hidden beast` number, since 642 + 7 + 0 + 6 + 6 + 5 = 666.

64270665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34327881 + 29942784 = 5859^2 + 5472^2 .

It is not a de Polignac number, because 64270665 - 2¹ = 64270663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64270663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12841 + ... + 17129.

It is an arithmetic number, because the mean of its divisors is an integer number (2958813).

Almost surely, 2^64270665 is an apocalyptic number.

It is an amenable number.

64270665 is a deficient number, since it is larger than the sum of its proper divisors (54081855).

64270665 is a wasteful number, since it uses less digits than its factorization.

64270665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343 (or 4334 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 64270665 is about 8016.8987145903. The cubic root of 64270665 is about 400.5630923622.

The spelling of 64270665 in words is "sixty-four million, two hundred seventy thousand, six hundred sixty-five".