145666555 has 8 divisors (see below), whose sum is σ = 174888432. Its totient is φ = 116474208.

The previous prime is 145666541. The next prime is 145666601. The reversal of 145666555 is 555666541.

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 145666555 - 2²⁵ = 112112123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5529 + ... + 17941.

It is an arithmetic number, because the mean of its divisors is an integer number (21861054).

Almost surely, 2^145666555 is an apocalyptic number.

145666555 is a deficient number, since it is larger than the sum of its proper divisors (29221877).

145666555 is a wasteful number, since it uses less digits than its factorization.

145666555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14765.

The product of its digits is 540000, while the sum is 43.

The square root of 145666555 is about 12069.2400340701. The cubic root of 145666555 is about 526.1625695651.

The spelling of 145666555 in words is "one hundred forty-five million, six hundred sixty-six thousand, five hundred fifty-five".