66057077 has 4 divisors (see below), whose sum is σ = 66241440. Its totient is φ = 65872716.

The previous prime is 66057067. The next prime is 66057113. The reversal of 66057077 is 77075066.

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 66057077 - 2¹⁸ = 65794933 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 66057077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66057067) 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, 91643 + ... + 92360.

It is an arithmetic number, because the mean of its divisors is an integer number (16560360).

Almost surely, 2^66057077 is an apocalyptic number.

It is an amenable number.

66057077 is a deficient number, since it is larger than the sum of its proper divisors (184363).

66057077 is a wasteful number, since it uses less digits than its factorization.

66057077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184362.

The product of its (nonzero) digits is 61740, while the sum is 38.

The square root of 66057077 is about 8127.5504919994. The cubic root of 66057077 is about 404.2404643835.

The spelling of 66057077 in words is "sixty-six million, fifty-seven thousand, seventy-seven".