66882742 has 4 divisors (see below), whose sum is σ = 100324116. Its totient is φ = 33441370.

The previous prime is 66882737. The next prime is 66882749. The reversal of 66882742 is 24728866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24728866 = 2 ⋅12364433.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66882749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16720684 + ... + 16720687.

It is an arithmetic number, because the mean of its divisors is an integer number (25081029).

Almost surely, 2^66882742 is an apocalyptic number.

66882742 is a deficient number, since it is larger than the sum of its proper divisors (33441374).

66882742 is a wasteful number, since it uses less digits than its factorization.

66882742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33441373.

The product of its digits is 258048, while the sum is 43.

The square root of 66882742 is about 8178.1869628910. The cubic root of 66882742 is about 405.9177318811.

The spelling of 66882742 in words is "sixty-six million, eight hundred eighty-two thousand, seven hundred forty-two".