66286057 has 4 divisors (see below), whose sum is σ = 66422656. Its totient is φ = 66149460.

The previous prime is 66286049. The next prime is 66286063. The reversal of 66286057 is 75068266.

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 not a de Polignac number, because 66286057 - 2³ = 66286049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66286037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67569 + ... + 68542.

It is an arithmetic number, because the mean of its divisors is an integer number (16605664).

Almost surely, 2^66286057 is an apocalyptic number.

It is an amenable number.

66286057 is a deficient number, since it is larger than the sum of its proper divisors (136599).

66286057 is a wasteful number, since it uses less digits than its factorization.

66286057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136598.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 66286057 is about 8141.6249606574. The cubic root of 66286057 is about 404.7070115874.

The spelling of 66286057 in words is "sixty-six million, two hundred eighty-six thousand, fifty-seven".