669159792 has 240 divisors, whose sum is σ = 2318184960. Its totient is φ = 182704896.

The previous prime is 669159781. The next prime is 669159793. The reversal of 669159792 is 297951966.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669159793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 625434 + ... + 626502.

It is an arithmetic number, because the mean of its divisors is an integer number (9659104).

Almost surely, 2^669159792 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 669159792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159092480).

669159792 is an abundant number, since it is smaller than the sum of its proper divisors (1649025168).

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

669159792 is a wasteful number, since it uses less digits than its factorization.

669159792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1104 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 669159792 is about 25868.1230861460. The cubic root of 669159792 is about 874.6680828704.

It can be divided in two parts, 669 and 159792, that added together give a triangular number (160461 = T₅₆₆).

The spelling of 669159792 in words is "six hundred sixty-nine million, one hundred fifty-nine thousand, seven hundred ninety-two".