66740829 has 8 divisors (see below), whose sum is σ = 89032320. Its totient is φ = 44471616.

The previous prime is 66740813. The next prime is 66740831. The reversal of 66740829 is 92804766.

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

It is not a de Polignac number, because 66740829 - 2⁴ = 66740813 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740899) 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, 3564 + ... + 12090.

It is an arithmetic number, because the mean of its divisors is an integer number (11129040).

Almost surely, 2^66740829 is an apocalyptic number.

It is an amenable number.

66740829 is a deficient number, since it is larger than the sum of its proper divisors (22291491).

66740829 is a wasteful number, since it uses less digits than its factorization.

66740829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11139.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 66740829 is about 8169.5060438193. The cubic root of 66740829 is about 405.6304340825.

The spelling of 66740829 in words is "sixty-six million, seven hundred forty thousand, eight hundred twenty-nine".