66407125244 has 12 divisors (see below), whose sum is σ = 116820912768. Its totient is φ = 33029721600.

The previous prime is 66407125237. The next prime is 66407125247. The reversal of 66407125244 is 44252170466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66407125247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43459397 + ... + 43460924.

It is an arithmetic number, because the mean of its divisors is an integer number (9735076064).

Almost surely, 2^66407125244 is an apocalyptic number.

It is an amenable number.

66407125244 is a deficient number, since it is larger than the sum of its proper divisors (50413787524).

66407125244 is a wasteful number, since it uses less digits than its factorization.

66407125244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86920516 (or 86920514 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 66407125244 in words is "sixty-six billion, four hundred seven million, one hundred twenty-five thousand, two hundred forty-four".