66707616 has 24 divisors (see below), whose sum is σ = 175107744. Its totient is φ = 22235840.

The previous prime is 66707611. The next prime is 66707621. The reversal of 66707616 is 61670766.

66707616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66707611) and next prime (66707621).

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (66707611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347340 + ... + 347531.

It is an arithmetic number, because the mean of its divisors is an integer number (7296156).

Almost surely, 2^66707616 is an apocalyptic number.

It is an amenable number.

66707616 is an abundant number, since it is smaller than the sum of its proper divisors (108400128).

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

66707616 is a wasteful number, since it uses less digits than its factorization.

66707616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694884 (or 694876 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66707616 is about 8167.4730486240. The cubic root of 66707616 is about 405.5631367515.

The spelling of 66707616 in words is "sixty-six million, seven hundred seven thousand, six hundred sixteen".