66065457 has 4 divisors (see below), whose sum is σ = 88087280. Its totient is φ = 44043636.

The previous prime is 66065437. The next prime is 66065471. The reversal of 66065457 is 75456066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66065457 - 2⁸ = 66065201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66065437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11010907 + ... + 11010912.

It is an arithmetic number, because the mean of its divisors is an integer number (22021820).

Almost surely, 2^66065457 is an apocalyptic number.

It is an amenable number.

66065457 is a deficient number, since it is larger than the sum of its proper divisors (22021823).

66065457 is a wasteful number, since it uses less digits than its factorization.

66065457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22021822.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 66065457 is about 8128.0660061296. The cubic root of 66065457 is about 404.2575576409.

The spelling of 66065457 in words is "sixty-six million, sixty-five thousand, four hundred fifty-seven".