1668700040 has 64 divisors (see below), whose sum is σ = 4294460160. Its totient is φ = 571656960.

The previous prime is 1668700039. The next prime is 1668700051. The reversal of 1668700040 is 400078661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 665429 + ... + 667931.

It is an arithmetic number, because the mean of its divisors is an integer number (67100940).

Almost surely, 2^1668700040 is an apocalyptic number.

1668700040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668700040 is an abundant number, since it is smaller than the sum of its proper divisors (2625760120).

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

1668700040 is a wasteful number, since it uses less digits than its factorization.

1668700040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902 (or 4898 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1668700040 is about 40849.7250908742. The cubic root of 1668700040 is about 1186.1130716777.

The spelling of 1668700040 in words is "one billion, six hundred sixty-eight million, seven hundred thousand, forty".