660343026 has 64 divisors (see below), whose sum is σ = 1538887680. Its totient is φ = 185008320.

The previous prime is 660343009. The next prime is 660343027. The reversal of 660343026 is 620343066.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 660342984 and 660343002.

It is not an unprimeable number, because it can be changed into a prime (660343027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 682395 + ... + 683361.

It is an arithmetic number, because the mean of its divisors is an integer number (24045120).

Almost surely, 2^660343026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660343026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769443840).

660343026 is an abundant number, since it is smaller than the sum of its proper divisors (878544654).

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

660343026 is a wasteful number, since it uses less digits than its factorization.

660343026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 660343026 is about 25697.1404245686. The cubic root of 660343026 is about 870.8095806672.

The spelling of 660343026 in words is "six hundred sixty million, three hundred forty-three thousand, twenty-six".