669830370912 has 288 divisors, whose sum is σ = 2087442977760. Its totient is φ = 211517402112.

The previous prime is 669830370907. The next prime is 669830370973. The reversal of 669830370912 is 219073038966.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×669830370912² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 25250968 + ... + 25277480.

It is an arithmetic number, because the mean of its divisors is an integer number (7248065895).

Almost surely, 2^669830370912 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 669830370912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043721488880).

669830370912 is an abundant number, since it is smaller than the sum of its proper divisors (1417612606848).

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

669830370912 is an equidigital number, since it uses as much as digits as its factorization.

669830370912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26582 (or 26537 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 669830370912 in words is "six hundred sixty-nine billion, eight hundred thirty million, three hundred seventy thousand, nine hundred twelve".