66326545 has 16 divisors (see below), whose sum is σ = 81087552. Its totient is φ = 52073280.

The previous prime is 66326543. The next prime is 66326569. The reversal of 66326545 is 54562366.

It is not a de Polignac number, because 66326545 - 2¹ = 66326543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66326543) 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, 74674 + ... + 75556.

It is an arithmetic number, because the mean of its divisors is an integer number (5067972).

Almost surely, 2^66326545 is an apocalyptic number.

It is an amenable number.

66326545 is a deficient number, since it is larger than the sum of its proper divisors (14761007).

66326545 is a wasteful number, since it uses less digits than its factorization.

66326545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152.

The product of its digits is 129600, while the sum is 37.

The square root of 66326545 is about 8144.1110626022. Note that the first 3 decimals coincide. The cubic root of 66326545 is about 404.7893941335.

The spelling of 66326545 in words is "sixty-six million, three hundred twenty-six thousand, five hundred forty-five".