699617421664 has 96 divisors (see below), whose sum is σ = 1651758635520. Its totient is φ = 285197079552.

The previous prime is 699617421661. The next prime is 699617421667. The reversal of 699617421664 is 466124716996.

It is an interprime number because it is at equal distance from previous prime (699617421661) and next prime (699617421667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699617421661) 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 15 ways as a sum of consecutive naturals, for example, 542892 + ... + 1301524.

It is an arithmetic number, because the mean of its divisors is an integer number (17205819120).

Almost surely, 2^699617421664 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 699617421664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825879317760).

699617421664 is an abundant number, since it is smaller than the sum of its proper divisors (952141213856).

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

699617421664 is a wasteful number, since it uses less digits than its factorization.

699617421664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758852 (or 758844 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 61.

The spelling of 699617421664 in words is "six hundred ninety-nine billion, six hundred seventeen million, four hundred twenty-one thousand, six hundred sixty-four".