145666417 has 8 divisors (see below), whose sum is σ = 157836224. Its totient is φ = 133634448.

The previous prime is 145666397. The next prime is 145666453. The reversal of 145666417 is 714666541.

145666417 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 145666417 - 2⁷ = 145666289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145666417.

It is not an unprimeable number, because it can be changed into a prime (145666487) 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, 32253 + ... + 36490.

It is an arithmetic number, because the mean of its divisors is an integer number (19729528).

Almost surely, 2^145666417 is an apocalyptic number.

It is an amenable number.

145666417 is a deficient number, since it is larger than the sum of its proper divisors (12169807).

145666417 is a wasteful number, since it uses less digits than its factorization.

145666417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68919.

The product of its digits is 120960, while the sum is 40.

The square root of 145666417 is about 12069.2343170559. The cubic root of 145666417 is about 526.1624034083.

The spelling of 145666417 in words is "one hundred forty-five million, six hundred sixty-six thousand, four hundred seventeen".