8629020866 has 16 divisors (see below), whose sum is σ = 13082977656. Its totient is φ = 4268069376.

The previous prime is 8629020863. The next prime is 8629020887. The reversal of 8629020866 is 6680209268.

It can be written as a sum of positive squares in 4 ways, for example, as 8620194025 + 8826841 = 92845^2 + 2971^2 .

It is a super-2 number, since 2×8629020866² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8629020866.

It is not an unprimeable number, because it can be changed into a prime (8629020863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471560 + ... + 489516.

Almost surely, 2^8629020866 is an apocalyptic number.

8629020866 is a deficient number, since it is larger than the sum of its proper divisors (4453956790).

8629020866 is a wasteful number, since it uses less digits than its factorization.

8629020866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20533.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 8629020866 is about 92892.5231975104. The cubic root of 8629020866 is about 2051.1015983757.

The spelling of 8629020866 in words is "eight billion, six hundred twenty-nine million, twenty thousand, eight hundred sixty-six".