66180514 has 4 divisors (see below), whose sum is σ = 99270774. Its totient is φ = 33090256.

The previous prime is 66180511. The next prime is 66180529. The reversal of 66180514 is 41508166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 29517489 = 6055^2 + 5433^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66180511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16545127 + ... + 16545130.

Almost surely, 2^66180514 is an apocalyptic number.

66180514 is a deficient number, since it is larger than the sum of its proper divisors (33090260).

66180514 is a wasteful number, since it uses less digits than its factorization.

66180514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33090259.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 66180514 is about 8135.1406871670. The cubic root of 66180514 is about 404.4921012207.

The spelling of 66180514 in words is "sixty-six million, one hundred eighty thousand, five hundred fourteen".