66253274 has 4 divisors (see below), whose sum is σ = 99379914. Its totient is φ = 33126636.

The previous prime is 66253249. The next prime is 66253279. The reversal of 66253274 is 47235266.

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., 50197225 + 16056049 = 7085^2 + 4007^2 .

It is not an unprimeable number, because it can be changed into a prime (66253279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16563317 + ... + 16563320.

Almost surely, 2^66253274 is an apocalyptic number.

66253274 is a deficient number, since it is larger than the sum of its proper divisors (33126640).

66253274 is a wasteful number, since it uses less digits than its factorization.

66253274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33126639.

The product of its digits is 60480, while the sum is 35.

The square root of 66253274 is about 8139.6114157864. The cubic root of 66253274 is about 404.6402821303.

The spelling of 66253274 in words is "sixty-six million, two hundred fifty-three thousand, two hundred seventy-four".