87509257766 has 16 divisors (see below), whose sum is σ = 158840333856. Its totient is φ = 35297851776.

The previous prime is 87509257757. The next prime is 87509257769. The reversal of 87509257766 is 66775290578.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87509257699 and 87509257708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87509257769) 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, 183842741 + ... + 183843216.

It is an arithmetic number, because the mean of its divisors is an integer number (9927520866).

Almost surely, 2^87509257766 is an apocalyptic number.

87509257766 is a deficient number, since it is larger than the sum of its proper divisors (71331076090).

87509257766 is a wasteful number, since it uses less digits than its factorization.

87509257766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367685983.

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 87509257766 in words is "eighty-seven billion, five hundred nine million, two hundred fifty-seven thousand, seven hundred sixty-six".