66774307 has 4 divisors (see below), whose sum is σ = 68579056. Its totient is φ = 64969560.

The previous prime is 66774287. The next prime is 66774319. The reversal of 66774307 is 70347766.

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 66774307 - 2¹⁵ = 66741539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66774307.

It is not an unprimeable number, because it can be changed into a prime (66774347) 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, 902319 + ... + 902392.

It is an arithmetic number, because the mean of its divisors is an integer number (17144764).

Almost surely, 2^66774307 is an apocalyptic number.

66774307 is a deficient number, since it is larger than the sum of its proper divisors (1804749).

66774307 is a wasteful number, since it uses less digits than its factorization.

66774307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804748.

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 66774307 is about 8171.5547480268. The cubic root of 66774307 is about 405.6982457751.

It can be divided in two parts, 66774 and 307, that added together give a square (67081 = 259²).

The spelling of 66774307 in words is "sixty-six million, seven hundred seventy-four thousand, three hundred seven".