66253706 has 8 divisors (see below), whose sum is σ = 99429444. Its totient is φ = 33110560.

The previous prime is 66253699. The next prime is 66253723. The reversal of 66253706 is 60735266.

It can be written as a sum of positive squares in 2 ways, for example, as 60295225 + 5958481 = 7765^2 + 2441^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195 + ... + 11718.

Almost surely, 2^66253706 is an apocalyptic number.

66253706 is a deficient number, since it is larger than the sum of its proper divisors (33175738).

66253706 is a wasteful number, since it uses less digits than its factorization.

66253706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16296.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 66253706 is about 8139.6379526365. The cubic root of 66253706 is about 404.6411616049.

The spelling of 66253706 in words is "sixty-six million, two hundred fifty-three thousand, seven hundred six".