660005040 has 40 divisors (see below), whose sum is σ = 2046016368. Its totient is φ = 176001280.

The previous prime is 660005039. The next prime is 660005051. The reversal of 660005040 is 40500066.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 660004998 and 660005016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374771 + ... + 1375250.

Almost surely, 2^660005040 is an apocalyptic number.

660005040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660005040 is an abundant number, since it is smaller than the sum of its proper divisors (1386011328).

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

660005040 is a wasteful number, since it uses less digits than its factorization.

660005040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750037 (or 2750031 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 660005040 is about 25690.5632480100. The cubic root of 660005040 is about 870.6609853340.

The spelling of 660005040 in words is "six hundred sixty million, five thousand, forty".