66842974 has 8 divisors (see below), whose sum is σ = 109379448. Its totient is φ = 30383160.

The previous prime is 66842959. The next prime is 66842981. The reversal of 66842974 is 47924866.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519137 + ... + 1519180.

It is an arithmetic number, because the mean of its divisors is an integer number (13672431).

Almost surely, 2^66842974 is an apocalyptic number.

66842974 is a deficient number, since it is larger than the sum of its proper divisors (42536474).

66842974 is a wasteful number, since it uses less digits than its factorization.

66842974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038330.

The product of its digits is 580608, while the sum is 46.

The square root of 66842974 is about 8175.7552556324. The cubic root of 66842974 is about 405.8372640038.

The spelling of 66842974 in words is "sixty-six million, eight hundred forty-two thousand, nine hundred seventy-four".