866620397346 has 32 divisors (see below), whose sum is σ = 1891354641408. Its totient is φ = 262536338640.

The previous prime is 866620397341. The next prime is 866620397387. The reversal of 866620397346 is 643793026668.

It is a happy number.

866620397346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×866620397346² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866620397346.

It is not an unprimeable number, because it can be changed into a prime (866620397341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667286 + ... + 2124401.

It is an arithmetic number, because the mean of its divisors is an integer number (59104832544).

Almost surely, 2^866620397346 is an apocalyptic number.

866620397346 is an abundant number, since it is smaller than the sum of its proper divisors (1024734244062).

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

866620397346 is a wasteful number, since it uses less digits than its factorization.

866620397346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795166.

The product of its (nonzero) digits is 47029248, while the sum is 60.

The spelling of 866620397346 in words is "eight hundred sixty-six billion, six hundred twenty million, three hundred ninety-seven thousand, three hundred forty-six".