65651561009901 has 8 divisors (see below), whose sum is σ = 97261571866560. Its totient is φ = 43767707339916.

The previous prime is 65651561009869. The next prime is 65651561009927. The reversal of 65651561009901 is 10990016515656.

65651561009901 is a `hidden beast` number, since 6 + 5 + 6 + 5 + 15 + 610 + 0 + 9 + 9 + 0 + 1 = 666.

It is not a de Polignac number, because 65651561009901 - 2⁵ = 65651561009869 is a prime.

It is a super-2 number, since 2×65651561009901² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65651561002901) 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, 1215769648305 + ... + 1215769648358.

It is an arithmetic number, because the mean of its divisors is an integer number (12157696483320).

Almost surely, 2^{65651561009901} is an apocalyptic number.

It is an amenable number.

65651561009901 is a deficient number, since it is larger than the sum of its proper divisors (31610010856659).

65651561009901 is a wasteful number, since it uses less digits than its factorization.

65651561009901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431539296672 (or 2431539296666 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 54.

The spelling of 65651561009901 in words is "sixty-five trillion, six hundred fifty-one billion, five hundred sixty-one million, nine thousand, nine hundred one".