66245716 has 12 divisors (see below), whose sum is σ = 115991680. Its totient is φ = 33105240.

The previous prime is 66245713. The next prime is 66245717. The reversal of 66245716 is 61754266.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66245713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7831 + ... + 13921.

Almost surely, 2^66245716 is an apocalyptic number.

It is an amenable number.

66245716 is a deficient number, since it is larger than the sum of its proper divisors (49745964).

66245716 is a wasteful number, since it uses less digits than its factorization.

66245716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8814 (or 8812 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 66245716 is about 8139.1471297673. The cubic root of 66245716 is about 404.6248947772.

The spelling of 66245716 in words is "sixty-six million, two hundred forty-five thousand, seven hundred sixteen".