66010545 has 20 divisors (see below), whose sum is σ = 118330740. Its totient is φ = 35205408.

The previous prime is 66010543. The next prime is 66010559. The reversal of 66010545 is 54501066.

It is a happy number.

66010545 is a `hidden beast` number, since 6 + 601 + 0 + 54 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11943936 + 54066609 = 3456^2 + 7353^2 .

It is not a de Polignac number, because 66010545 - 2¹ = 66010543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66010543) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81090 + ... + 81899.

It is an arithmetic number, because the mean of its divisors is an integer number (5916537).

Almost surely, 2^66010545 is an apocalyptic number.

It is an amenable number.

66010545 is a deficient number, since it is larger than the sum of its proper divisors (52320195).

66010545 is a wasteful number, since it uses less digits than its factorization.

66010545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163006 (or 162997 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 66010545 is about 8124.6873786011. The cubic root of 66010545 is about 404.1455235807.

The spelling of 66010545 in words is "sixty-six million, ten thousand, five hundred forty-five".