66925863 has 12 divisors (see below), whose sum is σ = 96919368. Its totient is φ = 44502480.

The previous prime is 66925861. The next prime is 66925907. The reversal of 66925863 is 36852966.

It is a happy number.

66925863 is a `hidden beast` number, since 6 + 69 + 2 + 586 + 3 = 666.

It is not a de Polignac number, because 66925863 - 2¹ = 66925861 is a prime.

It is a super-2 number, since 2×66925863² = 8958142276589538, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66925861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5793 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (8076614).

Almost surely, 2^66925863 is an apocalyptic number.

66925863 is a deficient number, since it is larger than the sum of its proper divisors (29993505).

66925863 is a wasteful number, since it uses less digits than its factorization.

66925863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19134 (or 19131 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 66925863 is about 8180.8228803709. The cubic root of 66925863 is about 406.0049482924.

The spelling of 66925863 in words is "sixty-six million, nine hundred twenty-five thousand, eight hundred sixty-three".