866830876505605 has 16 divisors (see below), whose sum is σ = 1134761940561600. Its totient is φ = 630421610968960.

The previous prime is 866830876505527. The next prime is 866830876505663. The reversal of 866830876505605 is 506505678038668.

It is a happy number.

It is not a de Polignac number, because 866830876505605 - 2¹⁵ = 866830876472837 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, 32441841 + ... + 52783849.

It is an arithmetic number, because the mean of its divisors is an integer number (70922621285100).

Almost surely, 2^{866830876505605} is an apocalyptic number.

It is an amenable number.

866830876505605 is a deficient number, since it is larger than the sum of its proper divisors (267931064055995).

866830876505605 is a wasteful number, since it uses less digits than its factorization.

866830876505605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21116804.

The product of its (nonzero) digits is 1741824000, while the sum is 73.

The spelling of 866830876505605 in words is "eight hundred sixty-six trillion, eight hundred thirty billion, eight hundred seventy-six million, five hundred five thousand, six hundred five".