660817476 has 72 divisors (see below), whose sum is σ = 1827431424. Its totient is φ = 199679040.

The previous prime is 660817457. The next prime is 660817477. The reversal of 660817476 is 674718066.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (660817477) 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 23 ways as a sum of consecutive naturals, for example, 149490 + ... + 153846.

It is an arithmetic number, because the mean of its divisors is an integer number (25380992).

Almost surely, 2^660817476 is an apocalyptic number.

660817476 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660817476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913715712).

660817476 is an abundant number, since it is smaller than the sum of its proper divisors (1166613948).

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

660817476 is a wasteful number, since it uses less digits than its factorization.

660817476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4761 (or 4756 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 660817476 is about 25706.3703388868. The cubic root of 660817476 is about 871.0180867917.

The spelling of 660817476 in words is "six hundred sixty million, eight hundred seventeen thousand, four hundred seventy-six".