660295776 has 288 divisors, whose sum is σ = 2233889280. Its totient is φ = 169365504.

The previous prime is 660295763. The next prime is 660295777. The reversal of 660295776 is 677592066.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660295777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1839085 + ... + 1839443.

It is an arithmetic number, because the mean of its divisors is an integer number (7756560).

Almost surely, 2^660295776 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 660295776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116944640).

660295776 is an abundant number, since it is smaller than the sum of its proper divisors (1573593504).

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

660295776 is a wasteful number, since it uses less digits than its factorization.

660295776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 660295776 is about 25696.2210451265. The cubic root of 660295776 is about 870.7888102835.

It can be divided in two parts, 6602 and 95776, that added together give a triangular number (102378 = T₄₅₂).

The spelling of 660295776 in words is "six hundred sixty million, two hundred ninety-five thousand, seven hundred seventy-six".