66004772 has 6 divisors (see below), whose sum is σ = 115508358. Its totient is φ = 33002384.

The previous prime is 66004753. The next prime is 66004787. The reversal of 66004772 is 27740066.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61058596 + 4946176 = 7814^2 + 2224^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250593 + ... + 8250600.

It is an arithmetic number, because the mean of its divisors is an integer number (19251393).

Almost surely, 2^66004772 is an apocalyptic number.

It is an amenable number.

66004772 is a deficient number, since it is larger than the sum of its proper divisors (49503586).

66004772 is a wasteful number, since it uses less digits than its factorization.

66004772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16501197 (or 16501195 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 66004772 is about 8124.3320956248. The cubic root of 66004772 is about 404.1337416241.

The spelling of 66004772 in words is "sixty-six million, four thousand, seven hundred seventy-two".