66445226653425 has 48 divisors (see below), whose sum is σ = 118330281996288. Its totient is φ = 32803253524800.

The previous prime is 66445226653411. The next prime is 66445226653451. The reversal of 66445226653425 is 52435662254466.

It is not a de Polignac number, because 66445226653425 - 2⁷ = 66445226653297 is a prime.

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, 621220267 + ... + 621327216.

It is an arithmetic number, because the mean of its divisors is an integer number (2465214208256).

Almost surely, 2^{66445226653425} is an apocalyptic number.

It is an amenable number.

66445226653425 is a deficient number, since it is larger than the sum of its proper divisors (51885055342863).

66445226653425 is a wasteful number, since it uses less digits than its factorization.

66445226653425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242547550 (or 1242547545 counting only the distinct ones).

The product of its digits is 248832000, while the sum is 60.

The spelling of 66445226653425 in words is "sixty-six trillion, four hundred forty-five billion, two hundred twenty-six million, six hundred fifty-three thousand, four hundred twenty-five".