669147024 has 160 divisors (see below), whose sum is σ = 2138752000. Its totient is φ = 175550976.

The previous prime is 669147007. The next prime is 669147071. The reversal of 669147024 is 420741966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1340727 + ... + 1341225.

It is an arithmetic number, because the mean of its divisors is an integer number (13367200).

Almost surely, 2^669147024 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 669147024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069376000).

669147024 is an abundant number, since it is smaller than the sum of its proper divisors (1469604976).

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

669147024 is a wasteful number, since it uses less digits than its factorization.

669147024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 669147024 is about 25867.8762947405. The cubic root of 669147024 is about 874.6625197582.

The spelling of 669147024 in words is "six hundred sixty-nine million, one hundred forty-seven thousand, twenty-four".