66706274 has 8 divisors (see below), whose sum is σ = 100324560. Its totient is φ = 33264756.

The previous prime is 66706271. The next prime is 66706307. The reversal of 66706274 is 47260766.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (66706271) 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 in 3 ways as a sum of consecutive naturals, for example, 43244 + ... + 44759.

It is an arithmetic number, because the mean of its divisors is an integer number (12540570).

Almost surely, 2^66706274 is an apocalyptic number.

66706274 is a deficient number, since it is larger than the sum of its proper divisors (33618286).

66706274 is a wasteful number, since it uses less digits than its factorization.

66706274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88384.

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

The square root of 66706274 is about 8167.3908930576. The cubic root of 66706274 is about 405.5604170751.

The spelling of 66706274 in words is "sixty-six million, seven hundred six thousand, two hundred seventy-four".