669157148928 has 144 divisors (see below), whose sum is σ = 1906443705600. Its totient is φ = 207730944000.

The previous prime is 669157148917. The next prime is 669157148929. The reversal of 669157148928 is 829841751966.

669157148928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×669157148928² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (669157148929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472303 + ... + 1249553.

It is an arithmetic number, because the mean of its divisors is an integer number (13239192400).

Almost surely, 2^669157148928 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 669157148928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953221852800).

669157148928 is an abundant number, since it is smaller than the sum of its proper divisors (1237286556672).

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

669157148928 is a wasteful number, since it uses less digits than its factorization.

669157148928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777348 (or 777334 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 66.

The spelling of 669157148928 in words is "six hundred sixty-nine billion, one hundred fifty-seven million, one hundred forty-eight thousand, nine hundred twenty-eight".