66489704 has 16 divisors (see below), whose sum is σ = 124783200. Its totient is φ = 33214192.

The previous prime is 66489701. The next prime is 66489713. The reversal of 66489704 is 40798466.

It is not an unprimeable number, because it can be changed into a prime (66489701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7277 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (7798950).

Almost surely, 2^66489704 is an apocalyptic number.

It is an amenable number.

66489704 is a deficient number, since it is larger than the sum of its proper divisors (58293496).

66489704 is a wasteful number, since it uses less digits than its factorization.

66489704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672 (or 7668 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 66489704 is about 8154.1219024491. The cubic root of 66489704 is about 405.1210408929.

The spelling of 66489704 in words is "sixty-six million, four hundred eighty-nine thousand, seven hundred four".