6355865866 has 16 divisors (see below), whose sum is σ = 10897750656. Its totient is φ = 2723447376.

The previous prime is 6355865863. The next prime is 6355865897. The reversal of 6355865866 is 6685685536.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6355865866.

It is not an unprimeable number, because it can be changed into a prime (6355865863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44680 + ... + 121276.

It is an arithmetic number, because the mean of its divisors is an integer number (681109416).

Almost surely, 2^6355865866 is an apocalyptic number.

6355865866 is a deficient number, since it is larger than the sum of its proper divisors (4541884790).

6355865866 is a wasteful number, since it uses less digits than its factorization.

6355865866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82533.

The product of its digits is 31104000, while the sum is 58.

The square root of 6355865866 is about 79723.6844733107. The cubic root of 6355865866 is about 1852.3579250977.

The spelling of 6355865866 in words is "six billion, three hundred fifty-five million, eight hundred sixty-five thousand, eight hundred sixty-six".