66545502 has 8 divisors (see below), whose sum is σ = 133091016. Its totient is φ = 22181832.

The previous prime is 66545491. The next prime is 66545503. The reversal of 66545502 is 20554566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

66545502 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66545503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545453 + ... + 5545464.

It is an arithmetic number, because the mean of its divisors is an integer number (16636377).

Almost surely, 2^66545502 is an apocalyptic number.

66545502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66545502 is a wasteful number, since it uses less digits than its factorization.

66545502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090922.

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

The square root of 66545502 is about 8157.5426446939. The cubic root of 66545502 is about 405.2343347419.

The spelling of 66545502 in words is "sixty-six million, five hundred forty-five thousand, five hundred two".