66116730 has 32 divisors (see below), whose sum is σ = 160228224. Its totient is φ = 17459136.

The previous prime is 66116717. The next prime is 66116731. The reversal of 66116730 is 3761166.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66116731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7609 + ... + 13788.

It is an arithmetic number, because the mean of its divisors is an integer number (5007132).

Almost surely, 2^66116730 is an apocalyptic number.

66116730 is an abundant number, since it is smaller than the sum of its proper divisors (94111494).

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

66116730 is a wasteful number, since it uses less digits than its factorization.

66116730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21510.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 66116730 is about 8131.2194657382. The cubic root of 66116730 is about 404.3621112097.

Adding to 66116730 its reverse (3761166), we get a palindrome (69877896).

It can be divided in two parts, 661 and 16730, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 66116730 in words is "sixty-six million, one hundred sixteen thousand, seven hundred thirty".