866477842078741 has 8 divisors (see below), whose sum is σ = 867832096786200. Its totient is φ = 865124520379392.

The previous prime is 866477842078691. The next prime is 866477842078757. The reversal of 866477842078741 is 147870248774668.

It can be written as a sum of positive squares in 4 ways, for example, as 224902630536516 + 641575211542225 = 14996754^2 + 25329335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866477842078741 - 2⁹ = 866477842078229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866477842078841) 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, 231393180 + ... + 235107973.

It is an arithmetic number, because the mean of its divisors is an integer number (108479012098275).

Almost surely, 2^{866477842078741} is an apocalyptic number.

It is an amenable number.

866477842078741 is a deficient number, since it is larger than the sum of its proper divisors (1354254707459).

866477842078741 is a wasteful number, since it uses less digits than its factorization.

866477842078741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466504055.

The product of its (nonzero) digits is 5664669696, while the sum is 79.

The spelling of 866477842078741 in words is "eight hundred sixty-six trillion, four hundred seventy-seven billion, eight hundred forty-two million, seventy-eight thousand, seven hundred forty-one".