66113345 has 4 divisors (see below), whose sum is σ = 79336020. Its totient is φ = 52890672.

The previous prime is 66113329. The next prime is 66113347. The reversal of 66113345 is 54331166.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35188624 + 30924721 = 5932^2 + 5561^2 .

It is a cyclic number.

It is not a de Polignac number, because 66113345 - 2⁴ = 66113329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66113347) 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, 6611330 + ... + 6611339.

It is an arithmetic number, because the mean of its divisors is an integer number (19834005).

Almost surely, 2^66113345 is an apocalyptic number.

It is an amenable number.

66113345 is a deficient number, since it is larger than the sum of its proper divisors (13222675).

66113345 is a wasteful number, since it uses less digits than its factorization.

66113345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13222674.

The product of its digits is 6480, while the sum is 29.

The square root of 66113345 is about 8131.0113147136. The cubic root of 66113345 is about 404.3552103385.

The spelling of 66113345 in words is "sixty-six million, one hundred thirteen thousand, three hundred forty-five".