647062666121 has 8 divisors (see below), whose sum is σ = 658489288704. Its totient is φ = 635734975680.

The previous prime is 647062666109. The next prime is 647062666153. The reversal of 647062666121 is 121666260746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647062666121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (647062606121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24719840 + ... + 24746001.

It is an arithmetic number, because the mean of its divisors is an integer number (82311161088).

Almost surely, 2^647062666121 is an apocalyptic number.

It is an amenable number.

647062666121 is a deficient number, since it is larger than the sum of its proper divisors (11426622583).

647062666121 is a wasteful number, since it uses less digits than its factorization.

647062666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49466071.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 647062666121 in words is "six hundred forty-seven billion, sixty-two million, six hundred sixty-six thousand, one hundred twenty-one".