66502545 has 32 divisors (see below), whose sum is σ = 113156352. Its totient is φ = 33276672.

The previous prime is 66502537. The next prime is 66502547. The reversal of 66502545 is 54520566.

It is a happy number.

It is not a de Polignac number, because 66502545 - 2³ = 66502537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66502547) 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, 16467 + ... + 20103.

It is an arithmetic number, because the mean of its divisors is an integer number (3536136).

Almost surely, 2^66502545 is an apocalyptic number.

It is an amenable number.

66502545 is a deficient number, since it is larger than the sum of its proper divisors (46653807).

66502545 is a wasteful number, since it uses less digits than its factorization.

66502545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 66502545 is about 8154.9092576190. The cubic root of 66502545 is about 405.1471192385.

The spelling of 66502545 in words is "sixty-six million, five hundred two thousand, five hundred forty-five".