651066255 has 224 divisors, whose sum is σ = 1510963200. Its totient is φ = 262020096.

The previous prime is 651066253. The next prime is 651066263. The reversal of 651066255 is 552660156.

It is a happy number.

It is a Cunningham number, because it is equal to 25516²-1.

It is not a de Polignac number, because 651066255 - 2¹ = 651066253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651066253) 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 223 ways as a sum of consecutive naturals, for example, 8241306 + ... + 8241384.

Almost surely, 2^651066255 is an apocalyptic number.

651066255 is an abundant number, since it is smaller than the sum of its proper divisors (859896945).

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

651066255 is a wasteful number, since it uses less digits than its factorization.

651066255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 651066255 is about 25515.9999804045. Note that the first 4 decimals coincide. The cubic root of 651066255 is about 866.7125039037.

The spelling of 651066255 in words is "six hundred fifty-one million, sixty-six thousand, two hundred fifty-five".