66783270 has 32 divisors (see below), whose sum is σ = 160996320. Its totient is φ = 17729280.

The previous prime is 66783263. The next prime is 66783281. The reversal of 66783270 is 7238766.

66783270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2010 + ... + 11730.

It is an arithmetic number, because the mean of its divisors is an integer number (5031135).

Almost surely, 2^66783270 is an apocalyptic number.

66783270 is an abundant number, since it is smaller than the sum of its proper divisors (94213050).

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

66783270 is a wasteful number, since it uses less digits than its factorization.

66783270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 66783270 is about 8172.1031564708. The cubic root of 66783270 is about 405.7163970214.

The spelling of 66783270 in words is "sixty-six million, seven hundred eighty-three thousand, two hundred seventy".