145666889 has 8 divisors (see below), whose sum is σ = 152487360. Its totient is φ = 138887056.

The previous prime is 145666883. The next prime is 145666903. The reversal of 145666889 is 988666541.

145666889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 145666889 - 2¹² = 145662793 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 145666889.

It is not an unprimeable number, because it can be changed into a prime (145666883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2699 + ... + 17280.

It is an arithmetic number, because the mean of its divisors is an integer number (19060920).

Almost surely, 2^145666889 is an apocalyptic number.

It is an amenable number.

145666889 is a deficient number, since it is larger than the sum of its proper divisors (6820471).

145666889 is a wasteful number, since it uses less digits than its factorization.

145666889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20319.

The product of its digits is 2488320, while the sum is 53.

The square root of 145666889 is about 12069.2538708903. The cubic root of 145666889 is about 526.1629717122.

The spelling of 145666889 in words is "one hundred forty-five million, six hundred sixty-six thousand, eight hundred eighty-nine".