66433725 has 36 divisors (see below), whose sum is σ = 119429856. Its totient is φ = 35300640.

The previous prime is 66433721. The next prime is 66433727. The reversal of 66433725 is 52733466.

66433725 is a `hidden beast` number, since 6 + 643 + 3 + 7 + 2 + 5 = 666.

It is not a de Polignac number, because 66433725 - 2² = 66433721 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 66433725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66433721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 112882 + ... + 113468.

It is an arithmetic number, because the mean of its divisors is an integer number (3317496).

Almost surely, 2^66433725 is an apocalyptic number.

It is an amenable number.

66433725 is a deficient number, since it is larger than the sum of its proper divisors (52996131).

66433725 is a wasteful number, since it uses less digits than its factorization.

66433725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1098 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 66433725 is about 8150.6886212148. The cubic root of 66433725 is about 405.0073158258.

The spelling of 66433725 in words is "sixty-six million, four hundred thirty-three thousand, seven hundred twenty-five".