651000340661 has 32 divisors (see below), whose sum is σ = 749271600000. Its totient is φ = 560110844160.

The previous prime is 651000340633. The next prime is 651000340687. The reversal of 651000340661 is 166043000156.

It is a de Polignac number, because none of the positive numbers 2^k-651000340661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651000343661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6518975 + ... + 6618083.

It is an arithmetic number, because the mean of its divisors is an integer number (23414737500).

Almost surely, 2^651000340661 is an apocalyptic number.

It is an amenable number.

651000340661 is a deficient number, since it is larger than the sum of its proper divisors (98271259339).

651000340661 is a wasteful number, since it uses less digits than its factorization.

651000340661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99557.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 651000340661 in words is "six hundred fifty-one billion, three hundred forty thousand, six hundred sixty-one".