66612283 has 4 divisors (see below), whose sum is σ = 66725208. Its totient is φ = 66499360.

The previous prime is 66612253. The next prime is 66612313. The reversal of 66612283 is 38221666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66612253) and next prime (66612313).

It is a cyclic number.

It is not a de Polignac number, because 66612283 - 2²¹ = 64515131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66612223) 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, 55573 + ... + 56758.

It is an arithmetic number, because the mean of its divisors is an integer number (16681302).

Almost surely, 2^66612283 is an apocalyptic number.

66612283 is a deficient number, since it is larger than the sum of its proper divisors (112925).

66612283 is a wasteful number, since it uses less digits than its factorization.

66612283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112924.

The product of its digits is 20736, while the sum is 34.

The square root of 66612283 is about 8161.6348239798. The cubic root of 66612283 is about 405.3698455616.

The spelling of 66612283 in words is "sixty-six million, six hundred twelve thousand, two hundred eighty-three".