66743698 has 16 divisors (see below), whose sum is σ = 114531840. Its totient is φ = 28575936.

The previous prime is 66743693. The next prime is 66743701. The reversal of 66743698 is 89634766.

It is not an unprimeable number, because it can be changed into a prime (66743693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18490 + ... + 21802.

It is an arithmetic number, because the mean of its divisors is an integer number (7158240).

Almost surely, 2^66743698 is an apocalyptic number.

66743698 is a deficient number, since it is larger than the sum of its proper divisors (47788142).

66743698 is a wasteful number, since it uses less digits than its factorization.

66743698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761.

The product of its digits is 1306368, while the sum is 49.

The square root of 66743698 is about 8169.6816339439. The cubic root of 66743698 is about 405.6362463020.

The spelling of 66743698 in words is "sixty-six million, seven hundred forty-three thousand, six hundred ninety-eight".