669381024 has 96 divisors (see below), whose sum is σ = 1897499520. Its totient is φ = 205396992.

The previous prime is 669380947. The next prime is 669381067. The reversal of 669381024 is 420183966.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 807042 + ... + 807870.

It is an arithmetic number, because the mean of its divisors is an integer number (19765620).

Almost surely, 2^669381024 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 669381024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948749760).

669381024 is an abundant number, since it is smaller than the sum of its proper divisors (1228118496).

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

669381024 is a wasteful number, since it uses less digits than its factorization.

669381024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 669381024 is about 25872.3988837525. The cubic root of 669381024 is about 874.7644640590.

The spelling of 669381024 in words is "six hundred sixty-nine million, three hundred eighty-one thousand, twenty-four".