66072674 has 4 divisors (see below), whose sum is σ = 99109014. Its totient is φ = 33036336.

The previous prime is 66072661. The next prime is 66072697. The reversal of 66072674 is 47627066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43652449 + 22420225 = 6607^2 + 4735^2 .

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 as a sum of consecutive naturals, namely, 16518167 + ... + 16518170.

Almost surely, 2^66072674 is an apocalyptic number.

66072674 is a deficient number, since it is larger than the sum of its proper divisors (33036340).

66072674 is a wasteful number, since it uses less digits than its factorization.

66072674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33036339.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 66072674 is about 8128.5099495541. The cubic root of 66072674 is about 404.2722774895.

The spelling of 66072674 in words is "sixty-six million, seventy-two thousand, six hundred seventy-four".