65006551566 has 64 divisors (see below), whose sum is σ = 166861762560. Its totient is φ = 18540190080.

The previous prime is 65006551559. The next prime is 65006551579. The reversal of 65006551566 is 66515560056.

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 31 ways as a sum of consecutive naturals, for example, 3208686 + ... + 3228881.

It is an arithmetic number, because the mean of its divisors is an integer number (2607215040).

Almost surely, 2^65006551566 is an apocalyptic number.

65006551566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

65006551566 is an abundant number, since it is smaller than the sum of its proper divisors (101855210994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65006551566 is a wasteful number, since it uses less digits than its factorization.

65006551566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437606 (or 6437600 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 65006551566 in words is "sixty-five billion, six million, five hundred fifty-one thousand, five hundred sixty-six".