145665733 has 4 divisors (see below), whose sum is σ = 147661228. Its totient is φ = 143670240.

The previous prime is 145665731. The next prime is 145665757. The reversal of 145665733 is 337566541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87647044 + 58018689 = 9362^2 + 7617^2 .

It is a cyclic number.

It is not a de Polignac number, because 145665733 - 2¹ = 145665731 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145665731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997638 + ... + 997783.

It is an arithmetic number, because the mean of its divisors is an integer number (36915307).

Almost surely, 2^145665733 is an apocalyptic number.

It is an amenable number.

145665733 is a deficient number, since it is larger than the sum of its proper divisors (1995495).

145665733 is an equidigital number, since it uses as much as digits as its factorization.

145665733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995494.

The product of its digits is 226800, while the sum is 40.

The square root of 145665733 is about 12069.2059805109. The cubic root of 145665733 is about 526.1615798470.

The spelling of 145665733 in words is "one hundred forty-five million, six hundred sixty-five thousand, seven hundred thirty-three".