66747772 has 24 divisors (see below), whose sum is σ = 143765216. Its totient is φ = 26405568.

The previous prime is 66747757. The next prime is 66747773. The reversal of 66747772 is 27774766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66747773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91323 + ... + 92050.

Almost surely, 2^66747772 is an apocalyptic number.

It is an amenable number.

66747772 is an abundant number, since it is smaller than the sum of its proper divisors (77017444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66747772 is a wasteful number, since it uses less digits than its factorization.

66747772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183397 (or 183395 counting only the distinct ones).

The product of its digits is 691488, while the sum is 46.

The square root of 66747772 is about 8169.9309666606. The cubic root of 66747772 is about 405.6444994080.

The spelling of 66747772 in words is "sixty-six million, seven hundred forty-seven thousand, seven hundred seventy-two".