66077757 has 12 divisors (see below), whose sum is σ = 95586400. Its totient is φ = 43986888.

The previous prime is 66077749. The next prime is 66077761. The reversal of 66077757 is 75777066.

It is a happy number.

66077757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66077757 - 2³ = 66077749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66077707) 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 11 ways as a sum of consecutive naturals, for example, 1494 + ... + 11592.

Almost surely, 2^66077757 is an apocalyptic number.

It is an amenable number.

66077757 is a deficient number, since it is larger than the sum of its proper divisors (29508643).

66077757 is a wasteful number, since it uses less digits than its factorization.

66077757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832 (or 10829 counting only the distinct ones).

The product of its (nonzero) digits is 432180, while the sum is 45.

The square root of 66077757 is about 8128.8226084717. The cubic root of 66077757 is about 404.2826441719.

The spelling of 66077757 in words is "sixty-six million, seventy-seven thousand, seven hundred fifty-seven".