66016545 has 32 divisors (see below), whose sum is σ = 127073280. Its totient is φ = 28589760.

The previous prime is 66016543. The next prime is 66016549. The reversal of 66016545 is 54561066.

It is not a de Polignac number, because 66016545 - 2¹ = 66016543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66016541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14551 + ... + 18540.

It is an arithmetic number, because the mean of its divisors is an integer number (3971040).

Almost surely, 2^66016545 is an apocalyptic number.

It is an amenable number.

66016545 is a deficient number, since it is larger than the sum of its proper divisors (61056735).

66016545 is a wasteful number, since it uses less digits than its factorization.

66016545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33125.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66016545 is about 8125.0566151874. The cubic root of 66016545 is about 404.1577680874.

It can be divided in two parts, 660 and 16545, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 66016545 in words is "sixty-six million, sixteen thousand, five hundred forty-five".