66842706 has 32 divisors (see below), whose sum is σ = 153106560. Its totient is φ = 19057536.

The previous prime is 66842701. The next prime is 66842723. The reversal of 66842706 is 60724866.

It is not an unprimeable number, because it can be changed into a prime (66842701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22500 + ... + 25296.

It is an arithmetic number, because the mean of its divisors is an integer number (4784580).

Almost surely, 2^66842706 is an apocalyptic number.

66842706 is an abundant number, since it is smaller than the sum of its proper divisors (86263854).

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

66842706 is a wasteful number, since it uses less digits than its factorization.

66842706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 66842706 is about 8175.7388656928. The cubic root of 66842706 is about 405.8367216156.

The spelling of 66842706 in words is "sixty-six million, eight hundred forty-two thousand, seven hundred six".