66067057 has 4 divisors (see below), whose sum is σ = 75505216. Its totient is φ = 56628900.

The previous prime is 66067039. The next prime is 66067061. The reversal of 66067057 is 75076066.

66067057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66067057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66067357) 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 3 ways as a sum of consecutive naturals, for example, 4719069 + ... + 4719082.

It is an arithmetic number, because the mean of its divisors is an integer number (18876304).

Almost surely, 2^66067057 is an apocalyptic number.

It is an amenable number.

66067057 is a deficient number, since it is larger than the sum of its proper divisors (9438159).

66067057 is an equidigital number, since it uses as much as digits as its factorization.

66067057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9438158.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 66067057 is about 8128.1644299313. The cubic root of 66067057 is about 404.2608211057.

Subtracting 66067057 from its reverse (75076066), we obtain a palindrome (9009009).

The spelling of 66067057 in words is "sixty-six million, sixty-seven thousand, fifty-seven".