71662306651 has 12 divisors (see below), whose sum is σ = 81981530512. Its totient is φ = 62258652288.

The previous prime is 71662306621. The next prime is 71662306691. The reversal of 71662306651 is 15660326617.

It is not a de Polignac number, because 71662306651 - 2⁵ = 71662306619 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71662306598 and 71662306607.

It is not an unprimeable number, because it can be changed into a prime (71662306621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9533415 + ... + 9540928.

Almost surely, 2^71662306651 is an apocalyptic number.

71662306651 is a deficient number, since it is larger than the sum of its proper divisors (10319223861).

71662306651 is a wasteful number, since it uses less digits than its factorization.

71662306651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19074390 (or 19074373 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 71662306651 in words is "seventy-one billion, six hundred sixty-two million, three hundred six thousand, six hundred fifty-one".