66000023 has 16 divisors (see below), whose sum is σ = 69866496. Its totient is φ = 62267520.

The previous prime is 66000013. The next prime is 66000029. The reversal of 66000023 is 32000066.

It is not a de Polignac number, because 66000023 - 2⁴ = 66000007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65999965 and 66000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290636 + ... + 290862.

It is an arithmetic number, because the mean of its divisors is an integer number (4366656).

Almost surely, 2^66000023 is an apocalyptic number.

66000023 is a deficient number, since it is larger than the sum of its proper divisors (3866473).

66000023 is a wasteful number, since it uses less digits than its factorization.

66000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 66000023 is about 8124.0398201880. The cubic root of 66000023 is about 404.1240490059.

Adding to 66000023 its reverse (32000066), we get a palindrome (98000089).

The spelling of 66000023 in words is "sixty-six million, twenty-three", and thus it is an aban number and an uban number.