66023289 has 16 divisors (see below), whose sum is σ = 99418240. Its totient is φ = 43292880.

The previous prime is 66023267. The next prime is 66023303. The reversal of 66023289 is 98232066.

It is not a de Polignac number, because 66023289 - 2¹² = 66019193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66023249) 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, 18397 + ... + 21690.

It is an arithmetic number, because the mean of its divisors is an integer number (6213640).

Almost surely, 2^66023289 is an apocalyptic number.

It is an amenable number.

66023289 is a deficient number, since it is larger than the sum of its proper divisors (33394951).

66023289 is a wasteful number, since it uses less digits than its factorization.

66023289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40157 (or 40151 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66023289 is about 8125.4716170817. The cubic root of 66023289 is about 404.1715300273.

It can be divided in two parts, 660 and 23289, that multiplied together give a triangular number (15370740 = T₅₅₄₄).

The spelling of 66023289 in words is "sixty-six million, twenty-three thousand, two hundred eighty-nine".