66000045 has 32 divisors (see below), whose sum is σ = 109549440. Its totient is φ = 33903360.

The previous prime is 66000043. The next prime is 66000047. The reversal of 66000045 is 54000066.

It is an interprime number because it is at equal distance from previous prime (66000043) and next prime (66000047).

It is not a de Polignac number, because 66000045 - 2¹ = 66000043 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65999985 and 66000030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59950 + ... + 61040.

It is an arithmetic number, because the mean of its divisors is an integer number (3423420).

Almost surely, 2^66000045 is an apocalyptic number.

It is an amenable number.

66000045 is a deficient number, since it is larger than the sum of its proper divisors (43549395).

66000045 is a wasteful number, since it uses less digits than its factorization.

66000045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 66000045 is about 8124.0411741940. The cubic root of 66000045 is about 404.1240939086.

Adding to 66000045 its sum of digits (21), we get a palindrome (66000066).

The spelling of 66000045 in words is "sixty-six million, forty-five", and thus it is an aban number and an uban number.