66511023 has 8 divisors (see below), whose sum is σ = 88754736. Its totient is φ = 44304000.

The previous prime is 66511019. The next prime is 66511031. The reversal of 66511023 is 32011566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66511023 - 2² = 66511019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66510984 and 66511002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66511033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4618 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (11094342).

Almost surely, 2^66511023 is an apocalyptic number.

66511023 is a deficient number, since it is larger than the sum of its proper divisors (22243713).

66511023 is a wasteful number, since it uses less digits than its factorization.

66511023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18345.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 66511023 is about 8155.4290506386. The cubic root of 66511023 is about 405.1643350775.

Adding to 66511023 its reverse (32011566), we get a palindrome (98522589).

The spelling of 66511023 in words is "sixty-six million, five hundred eleven thousand, twenty-three".