66216130 has 16 divisors (see below), whose sum is σ = 121961664. Its totient is φ = 25870320.

The previous prime is 66216109. The next prime is 66216151. The reversal of 66216130 is 3161266.

It is an interprime number because it is at equal distance from previous prime (66216109) and next prime (66216151).

It is a junction number, because it is equal to n+sod(n) for n = 66216095 and 66216104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76566 + ... + 77425.

It is an arithmetic number, because the mean of its divisors is an integer number (7622604).

Almost surely, 2^66216130 is an apocalyptic number.

66216130 is a deficient number, since it is larger than the sum of its proper divisors (55745534).

66216130 is a wasteful number, since it uses less digits than its factorization.

66216130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154041.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66216130 is about 8137.3294144947. The cubic root of 66216130 is about 404.5646492979.

Adding to 66216130 its reverse (3161266), we get a palindrome (69377396).

The spelling of 66216130 in words is "sixty-six million, two hundred sixteen thousand, one hundred thirty".