651606661061 has 8 divisors (see below), whose sum is σ = 674130213120. Its totient is φ = 629086732848.

The previous prime is 651606661049. The next prime is 651606661063. The reversal of 651606661061 is 160166606156.

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

It is a cyclic number.

It is not a de Polignac number, because 651606661061 - 2¹⁰ = 651606660037 is a prime.

It is a super-3 number, since 3×651606661061³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651606661063) 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, 537581 + ... + 1261826.

It is an arithmetic number, because the mean of its divisors is an integer number (84266276640).

Almost surely, 2^651606661061 is an apocalyptic number.

It is an amenable number.

651606661061 is a deficient number, since it is larger than the sum of its proper divisors (22523552059).

651606661061 is a wasteful number, since it uses less digits than its factorization.

651606661061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811923.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 651606661061 in words is "six hundred fifty-one billion, six hundred six million, six hundred sixty-one thousand, sixty-one".