66782572 has 12 divisors (see below), whose sum is σ = 118850760. Its totient is φ = 32825216.

The previous prime is 66782537. The next prime is 66782581. The reversal of 66782572 is 27528766.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141253 + ... + 141724.

It is an arithmetic number, because the mean of its divisors is an integer number (9904230).

Almost surely, 2^66782572 is an apocalyptic number.

It is an amenable number.

66782572 is a deficient number, since it is larger than the sum of its proper divisors (52068188).

66782572 is a wasteful number, since it uses less digits than its factorization.

66782572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283040 (or 283038 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 66782572 is about 8172.0604500946. The cubic root of 66782572 is about 405.7149835385.

The spelling of 66782572 in words is "sixty-six million, seven hundred eighty-two thousand, five hundred seventy-two".