660941424 has 240 divisors, whose sum is σ = 2243784960. Its totient is φ = 184654080.

The previous prime is 660941389. The next prime is 660941441. The reversal of 660941424 is 424149066.

660941424 is a `hidden beast` number, since 6 + 609 + 4 + 1 + 42 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 802677 + ... + 803499.

It is an arithmetic number, because the mean of its divisors is an integer number (9349104).

Almost surely, 2^660941424 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 660941424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121892480).

660941424 is an abundant number, since it is smaller than the sum of its proper divisors (1582843536).

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

660941424 is a wasteful number, since it uses less digits than its factorization.

660941424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 660941424 is about 25708.7810679542. The cubic root of 660941424 is about 871.0725416674.

The spelling of 660941424 in words is "six hundred sixty million, nine hundred forty-one thousand, four hundred twenty-four".