66333261 has 8 divisors (see below), whose sum is σ = 88491424. Its totient is φ = 44198640.

The previous prime is 66333257. The next prime is 66333329. The reversal of 66333261 is 16233366.

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

It is not a de Polignac number, because 66333261 - 2² = 66333257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66333221) 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, 2331 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (11061428).

Almost surely, 2^66333261 is an apocalyptic number.

It is an amenable number.

66333261 is a deficient number, since it is larger than the sum of its proper divisors (22158163).

66333261 is a wasteful number, since it uses less digits than its factorization.

66333261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11771.

The product of its digits is 11664, while the sum is 30.

The square root of 66333261 is about 8144.5233746365. The cubic root of 66333261 is about 404.8030562040.

The spelling of 66333261 in words is "sixty-six million, three hundred thirty-three thousand, two hundred sixty-one".