66775141 has 6 divisors (see below), whose sum is σ = 69805190. Its totient is φ = 63871368.

The previous prime is 66775123. The next prime is 66775153. The reversal of 66775141 is 14157766.

It can be written as a sum of positive squares in only one way, i.e., 46036225 + 20738916 = 6785^2 + 4554^2 .

It is not a de Polignac number, because 66775141 - 2⁷ = 66775013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66775141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62586 + ... + 63643.

Almost surely, 2^66775141 is an apocalyptic number.

It is an amenable number.

66775141 is a deficient number, since it is larger than the sum of its proper divisors (3030049).

66775141 is a wasteful number, since it uses less digits than its factorization.

66775141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126275 (or 126252 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 66775141 is about 8171.6057785481. The cubic root of 66775141 is about 405.6999348026.

The spelling of 66775141 in words is "sixty-six million, seven hundred seventy-five thousand, one hundred forty-one".