66841425 has 108 divisors (see below), whose sum is σ = 145157376. Its totient is φ = 28771200.

The previous prime is 66841391. The next prime is 66841429. The reversal of 66841425 is 52414866.

It is not a de Polignac number, because 66841425 - 2⁶ = 66841361 is a prime.

Its product of digits (46080) is a multiple of the sum of its prime factors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 66841425.

It is not an unprimeable number, because it can be changed into a prime (66841429) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1806507 + ... + 1806543.

Almost surely, 2^66841425 is an apocalyptic number.

It is an amenable number.

66841425 is an abundant number, since it is smaller than the sum of its proper divisors (78315951).

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

66841425 is a wasteful number, since it uses less digits than its factorization.

66841425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 83 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 66841425 is about 8175.6605237742. The cubic root of 66841425 is about 405.8341290607.

The spelling of 66841425 in words is "sixty-six million, eight hundred forty-one thousand, four hundred twenty-five".