66946277 has 4 divisors (see below), whose sum is σ = 66980940. Its totient is φ = 66911616.

The previous prime is 66946249. The next prime is 66946331. The reversal of 66946277 is 77264966.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39551521 + 27394756 = 6289^2 + 5234^2 .

It is a cyclic number.

It is not a de Polignac number, because 66946277 - 2¹² = 66942181 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 (66946207) 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, 14252 + ... + 18357.

It is an arithmetic number, because the mean of its divisors is an integer number (16745235).

Almost surely, 2^66946277 is an apocalyptic number.

It is an amenable number.

66946277 is a deficient number, since it is larger than the sum of its proper divisors (34663).

66946277 is a wasteful number, since it uses less digits than its factorization.

66946277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34662.

The product of its digits is 762048, while the sum is 47.

The square root of 66946277 is about 8182.0704592420. The cubic root of 66946277 is about 406.0462245250.

The spelling of 66946277 in words is "sixty-six million, nine hundred forty-six thousand, two hundred seventy-seven".