66777322 has 8 divisors (see below), whose sum is σ = 101198916. Its totient is φ = 33044352.

The previous prime is 66777313. The next prime is 66777329. The reversal of 66777322 is 22377766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64786401 + 1990921 = 8049^2 + 1411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66777329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171913 + ... + 172300.

Almost surely, 2^66777322 is an apocalyptic number.

66777322 is a deficient number, since it is larger than the sum of its proper divisors (34421594).

66777322 is a wasteful number, since it uses less digits than its factorization.

66777322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344312.

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

The square root of 66777322 is about 8171.7392273616. The cubic root of 66777322 is about 405.7043517254.

The spelling of 66777322 in words is "sixty-six million, seven hundred seventy-seven thousand, three hundred twenty-two".