66034518 has 64 divisors (see below), whose sum is σ = 154151424. Its totient is φ = 18656000.

The previous prime is 66034517. The next prime is 66034523. The reversal of 66034518 is 81543066.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66034517) 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, 61708 + ... + 62768.

It is an arithmetic number, because the mean of its divisors is an integer number (2408616).

Almost surely, 2^66034518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66034518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77075712).

66034518 is an abundant number, since it is smaller than the sum of its proper divisors (88116906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66034518 is a wasteful number, since it uses less digits than its factorization.

66034518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 66034518 is about 8126.1625629814. The cubic root of 66034518 is about 404.1944420680.

The spelling of 66034518 in words is "sixty-six million, thirty-four thousand, five hundred eighteen".