66081465 has 24 divisors (see below), whose sum is σ = 121280328. Its totient is φ = 33169920.

The previous prime is 66081437. The next prime is 66081467. The reversal of 66081465 is 56418066.

66081465 is a `hidden beast` number, since 6 + 608 + 1 + 46 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11128896 + 54952569 = 3336^2 + 7413^2 .

It is not a de Polignac number, because 66081465 - 2¹⁴ = 66065081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66081467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42426 + ... + 43955.

It is an arithmetic number, because the mean of its divisors is an integer number (5053347).

Almost surely, 2^66081465 is an apocalyptic number.

It is an amenable number.

66081465 is a deficient number, since it is larger than the sum of its proper divisors (55198863).

66081465 is a wasteful number, since it uses less digits than its factorization.

66081465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86409 (or 86406 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66081465 is about 8129.0506825828. The cubic root of 66081465 is about 404.2902062325.

The spelling of 66081465 in words is "sixty-six million, eighty-one thousand, four hundred sixty-five".