66061612 has 24 divisors (see below), whose sum is σ = 120960000. Its totient is φ = 31509456.

The previous prime is 66061603. The next prime is 66061621. The reversal of 66061612 is 21616066.

It is an interprime number because it is at equal distance from previous prime (66061603) and next prime (66061621).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45189 + ... + 46627.

It is an arithmetic number, because the mean of its divisors is an integer number (5040000).

Almost surely, 2^66061612 is an apocalyptic number.

It is an amenable number.

66061612 is a deficient number, since it is larger than the sum of its proper divisors (54898388).

66061612 is a wasteful number, since it uses less digits than its factorization.

66061612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1963 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66061612 is about 8127.8294765577. The cubic root of 66061612 is about 404.2497149117.

Adding to 66061612 its reverse (21616066), we get a palindrome (87677678).

The spelling of 66061612 in words is "sixty-six million, sixty-one thousand, six hundred twelve".