647666300325 has 24 divisors (see below), whose sum is σ = 1168154492256. Its totient is φ = 314020024000.

The previous prime is 647666300317. The next prime is 647666300357. The reversal of 647666300325 is 523003666746.

It is not a de Polignac number, because 647666300325 - 2³ = 647666300317 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392524206 + ... + 392525855.

It is an arithmetic number, because the mean of its divisors is an integer number (48673103844).

Almost surely, 2^647666300325 is an apocalyptic number.

It is an amenable number.

647666300325 is a deficient number, since it is larger than the sum of its proper divisors (520488191931).

647666300325 is a wasteful number, since it uses less digits than its factorization.

647666300325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785050085 (or 785050080 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 48.

The spelling of 647666300325 in words is "six hundred forty-seven billion, six hundred sixty-six million, three hundred thousand, three hundred twenty-five".