66765284 has 6 divisors (see below), whose sum is σ = 116839254. Its totient is φ = 33382640.

The previous prime is 66765269. The next prime is 66765287. The reversal of 66765284 is 48256766.

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 16384 = 8170^2 + 128^2 .

It is not an unprimeable number, because it can be changed into a prime (66765287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8345657 + ... + 8345664.

It is an arithmetic number, because the mean of its divisors is an integer number (19473209).

Almost surely, 2^66765284 is an apocalyptic number.

It is an amenable number.

66765284 is a deficient number, since it is larger than the sum of its proper divisors (50073970).

66765284 is a wasteful number, since it uses less digits than its factorization.

66765284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16691325 (or 16691323 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 66765284 is about 8171.0026312565. The cubic root of 66765284 is about 405.6799713802.

The spelling of 66765284 in words is "sixty-six million, seven hundred sixty-five thousand, two hundred eighty-four".