667703560 has 64 divisors (see below), whose sum is σ = 1616883120. Its totient is φ = 247234560.

The previous prime is 667703557. The next prime is 667703563. The reversal of 667703560 is 65307766.

It is an interprime number because it is at equal distance from previous prime (667703557) and next prime (667703563).

It can be written as a sum of positive squares in 8 ways, for example, as 212051844 + 455651716 = 14562^2 + 21346^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (667703563) 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 15 ways as a sum of consecutive naturals, for example, 33432 + ... + 49528.

Almost surely, 2^667703560 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 667703560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808441560).

667703560 is an abundant number, since it is smaller than the sum of its proper divisors (949179560).

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

667703560 is a wasteful number, since it uses less digits than its factorization.

667703560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16186 (or 16182 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 667703560 is about 25839.9605262856. The cubic root of 667703560 is about 874.0331350120.

The spelling of 667703560 in words is "six hundred sixty-seven million, seven hundred three thousand, five hundred sixty".