699981667056 has 1440 divisors, whose sum is σ = 2603213383680. Its totient is φ = 181062604800.

The previous prime is 699981667037. The next prime is 699981667057. The reversal of 699981667056 is 650766189996.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699981667057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 10447487535 + ... + 10447487601.

It is an arithmetic number, because the mean of its divisors is an integer number (1807787072).

Almost surely, 2^699981667056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699981667056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1301606691840).

699981667056 is an abundant number, since it is smaller than the sum of its proper divisors (1903231716624).

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

699981667056 is a wasteful number, since it uses less digits than its factorization.

699981667056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 72.

The spelling of 699981667056 in words is "six hundred ninety-nine billion, nine hundred eighty-one million, six hundred sixty-seven thousand, fifty-six".