66570782 has 8 divisors (see below), whose sum is σ = 99975000. Its totient is φ = 33245784.

The previous prime is 66570781. The next prime is 66570787. The reversal of 66570782 is 28707566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17657 + ... + 21092.

It is an arithmetic number, because the mean of its divisors is an integer number (12496875).

Almost surely, 2^66570782 is an apocalyptic number.

66570782 is a deficient number, since it is larger than the sum of its proper divisors (33404218).

66570782 is a wasteful number, since it uses less digits than its factorization.

66570782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39610.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 66570782 is about 8159.0919837933. The cubic root of 66570782 is about 405.2856431284.

The spelling of 66570782 in words is "sixty-six million, five hundred seventy thousand, seven hundred eighty-two".