66140425 has 24 divisors (see below), whose sum is σ = 92980160. Its totient is φ = 46267200.

The previous prime is 66140419. The next prime is 66140441. The reversal of 66140425 is 52404166.

66140425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66140425 - 2⁷ = 66140297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66140393 and 66140402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820 + ... + 11530.

Almost surely, 2^66140425 is an apocalyptic number.

66140425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66140425 is a deficient number, since it is larger than the sum of its proper divisors (26839735).

66140425 is a wasteful number, since it uses less digits than its factorization.

66140425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10753 (or 10748 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 66140425 is about 8132.6763737407. The cubic root of 66140425 is about 404.4104107140.

The spelling of 66140425 in words is "sixty-six million, one hundred forty thousand, four hundred twenty-five".