651566666061 has 8 divisors (see below), whose sum is σ = 965283949760. Its totient is φ = 434377777356.

The previous prime is 651566666053. The next prime is 651566666119. The reversal of 651566666061 is 160666665156.

651566666061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 651566666061 - 2³ = 651566666053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 651566665989 and 651566666007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651566666011) 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, 12066049345 + ... + 12066049398.

It is an arithmetic number, because the mean of its divisors is an integer number (120660493720).

Almost surely, 2^651566666061 is an apocalyptic number.

It is an amenable number.

651566666061 is a deficient number, since it is larger than the sum of its proper divisors (313717283699).

651566666061 is a wasteful number, since it uses less digits than its factorization.

651566666061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24132098752 (or 24132098746 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 651566666061 in words is "six hundred fifty-one billion, five hundred sixty-six million, six hundred sixty-six thousand, sixty-one".