651116655 has 36 divisors (see below), whose sum is σ = 1312868232. Its totient is φ = 297652320.

The previous prime is 651116651. The next prime is 651116659. The reversal of 651116655 is 556611156.

It is an interprime number because it is at equal distance from previous prime (651116651) and next prime (651116659).

It is not a de Polignac number, because 651116655 - 2² = 651116651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651116651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 145441 + ... + 149850.

It is an arithmetic number, because the mean of its divisors is an integer number (36468562).

Almost surely, 2^651116655 is an apocalyptic number.

651116655 is an abundant number, since it is smaller than the sum of its proper divisors (661751577).

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

651116655 is a wasteful number, since it uses less digits than its factorization.

651116655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295316 (or 295306 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 651116655 is about 25516.9875769065. The cubic root of 651116655 is about 866.7348678248.

The spelling of 651116655 in words is "six hundred fifty-one million, one hundred sixteen thousand, six hundred fifty-five".