87971066655 has 16 divisors (see below), whose sum is σ = 146873433600. Its totient is φ = 44877993248.

The previous prime is 87971066621. The next prime is 87971066737. The reversal of 87971066655 is 55666017978.

It is a cyclic number.

It is not a de Polignac number, because 87971066655 - 2¹⁶ = 87971001119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127493955 + ... + 127494644.

It is an arithmetic number, because the mean of its divisors is an integer number (9179589600).

Almost surely, 2^87971066655 is an apocalyptic number.

87971066655 is a deficient number, since it is larger than the sum of its proper divisors (58902366945).

87971066655 is a wasteful number, since it uses less digits than its factorization.

87971066655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254988630.

The product of its (nonzero) digits is 19051200, while the sum is 60.

The spelling of 87971066655 in words is "eighty-seven billion, nine hundred seventy-one million, sixty-six thousand, six hundred fifty-five".