66261333 has 4 divisors (see below), whose sum is σ = 88348448. Its totient is φ = 44174220.

The previous prime is 66261313. The next prime is 66261347. The reversal of 66261333 is 33316266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66261333 - 2⁶ = 66261269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66261333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66261313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11043553 + ... + 11043558.

It is an arithmetic number, because the mean of its divisors is an integer number (22087112).

Almost surely, 2^66261333 is an apocalyptic number.

It is an amenable number.

66261333 is a deficient number, since it is larger than the sum of its proper divisors (22087115).

66261333 is a wasteful number, since it uses less digits than its factorization.

66261333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22087114.

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

The square root of 66261333 is about 8140.1064489354. The cubic root of 66261333 is about 404.6566881815.

Adding to 66261333 its reverse (33316266), we get a palindrome (99577599).

The spelling of 66261333 in words is "sixty-six million, two hundred sixty-one thousand, three hundred thirty-three".