66674692 has 36 divisors (see below), whose sum is σ = 139057884. Its totient is φ = 27874560.

The previous prime is 66674687. The next prime is 66674753. The reversal of 66674692 is 29647666.

It can be written as a sum of positive squares in 2 ways, for example, as 37773316 + 28901376 = 6146^2 + 5376^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3888 + ... + 12184.

It is an arithmetic number, because the mean of its divisors is an integer number (3862719).

Almost surely, 2^66674692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66674692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69528942).

66674692 is an abundant number, since it is smaller than the sum of its proper divisors (72383192).

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

66674692 is a wasteful number, since it uses less digits than its factorization.

66674692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356 (or 8347 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 66674692 is about 8165.4572437800. The cubic root of 66674692 is about 405.4964029515.

The spelling of 66674692 in words is "sixty-six million, six hundred seventy-four thousand, six hundred ninety-two".