66920316 has 12 divisors (see below), whose sum is σ = 156147432. Its totient is φ = 22306768.

The previous prime is 66920311. The next prime is 66920333. The reversal of 66920316 is 61302966.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66920311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788335 + ... + 2788358.

It is an arithmetic number, because the mean of its divisors is an integer number (13012286).

Almost surely, 2^66920316 is an apocalyptic number.

It is an amenable number.

66920316 is an abundant number, since it is smaller than the sum of its proper divisors (89227116).

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

66920316 is a wasteful number, since it uses less digits than its factorization.

66920316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576700 (or 5576698 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 66920316 is about 8180.4838487708. The cubic root of 66920316 is about 405.9937310461.

The spelling of 66920316 in words is "sixty-six million, nine hundred twenty thousand, three hundred sixteen".