66252291 has 8 divisors (see below), whose sum is σ = 100955904. Its totient is φ = 37858440.

The previous prime is 66252289. The next prime is 66252299. The reversal of 66252291 is 19225266.

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

It is not a de Polignac number, because 66252291 - 2¹ = 66252289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66252299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577415 + ... + 1577456.

It is an arithmetic number, because the mean of its divisors is an integer number (12619488).

Almost surely, 2^66252291 is an apocalyptic number.

66252291 is a deficient number, since it is larger than the sum of its proper divisors (34703613).

66252291 is a wasteful number, since it uses less digits than its factorization.

66252291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154881.

The product of its digits is 12960, while the sum is 33.

The square root of 66252291 is about 8139.5510318444. The cubic root of 66252291 is about 404.6382809041.

The spelling of 66252291 in words is "sixty-six million, two hundred fifty-two thousand, two hundred ninety-one".