66729822 has 8 divisors (see below), whose sum is σ = 133459656. Its totient is φ = 22243272.

The previous prime is 66729821. The next prime is 66729829. The reversal of 66729822 is 22892766.

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

66729822 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66729821) 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, 5560813 + ... + 5560824.

It is an arithmetic number, because the mean of its divisors is an integer number (16682457).

Almost surely, 2^66729822 is an apocalyptic number.

66729822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66729822 is a wasteful number, since it uses less digits than its factorization.

66729822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121642.

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

The square root of 66729822 is about 8168.8323523010. The cubic root of 66729822 is about 405.6081337919.

The spelling of 66729822 in words is "sixty-six million, seven hundred twenty-nine thousand, eight hundred twenty-two".