666600240 has 40 divisors (see below), whose sum is σ = 2066461488. Its totient is φ = 177760000.

The previous prime is 666600227. The next prime is 666600257. The reversal of 666600240 is 42006666.

666600240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 666600198 and 666600207.

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, 1388511 + ... + 1388990.

Almost surely, 2^666600240 is an apocalyptic number.

666600240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666600240 is an abundant number, since it is smaller than the sum of its proper divisors (1399861248).

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

666600240 is a wasteful number, since it uses less digits than its factorization.

666600240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777517 (or 2777511 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 666600240 is about 25818.6025958029. The cubic root of 666600240 is about 873.5514492534.

The spelling of 666600240 in words is "six hundred sixty-six million, six hundred thousand, two hundred forty".