66777283 has 4 divisors (see below), whose sum is σ = 66835008. Its totient is φ = 66719560.

The previous prime is 66777259. The next prime is 66777289. The reversal of 66777283 is 38277766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66777283 - 2⁵ = 66777251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66777289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27091 + ... + 29452.

It is an arithmetic number, because the mean of its divisors is an integer number (16708752).

Almost surely, 2^66777283 is an apocalyptic number.

66777283 is a deficient number, since it is larger than the sum of its proper divisors (57725).

66777283 is a wasteful number, since it uses less digits than its factorization.

66777283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57724.

The product of its digits is 592704, while the sum is 46.

The square root of 66777283 is about 8171.7368410883. The cubic root of 66777283 is about 405.7042727441.

The spelling of 66777283 in words is "sixty-six million, seven hundred seventy-seven thousand, two hundred eighty-three".