66425445 has 48 divisors (see below), whose sum is σ = 118609920. Its totient is φ = 34376832.

The previous prime is 66425413. The next prime is 66425473. The reversal of 66425445 is 54452466.

66425445 is a `hidden beast` number, since 6 + 642 + 5 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 66425445 - 2⁵ = 66425413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337087 + ... + 337283.

It is an arithmetic number, because the mean of its divisors is an integer number (2471040).

Almost surely, 2^66425445 is an apocalyptic number.

It is an amenable number.

66425445 is a deficient number, since it is larger than the sum of its proper divisors (52184475).

66425445 is a wasteful number, since it uses less digits than its factorization.

66425445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 391 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 66425445 is about 8150.1806728440. The cubic root of 66425445 is about 404.9904890313.

The spelling of 66425445 in words is "sixty-six million, four hundred twenty-five thousand, four hundred forty-five".