66600772 has 36 divisors (see below), whose sum is σ = 137996544. Its totient is φ = 27522720.

The previous prime is 66600767. The next prime is 66600797. The reversal of 66600772 is 27700666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240298 + ... + 240574.

Almost surely, 2^66600772 is an apocalyptic number.

66600772 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66600772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68998272).

66600772 is an abundant number, since it is smaller than the sum of its proper divisors (71395772).

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

66600772 is a wasteful number, since it uses less digits than its factorization.

66600772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66600772 is about 8160.9296039116. The cubic root of 66600772 is about 405.3464941071.

The spelling of 66600772 in words is "sixty-six million, six hundred thousand, seven hundred seventy-two".