1666850040 has 48 divisors (see below), whose sum is σ = 5417263800. Its totient is φ = 444493248.

The previous prime is 1666850033. The next prime is 1666850041. The reversal of 1666850040 is 400586661.

1666850040 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1666849977 and 1666850004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666850041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2314710 + ... + 2315429.

Almost surely, 2^1666850040 is an apocalyptic number.

1666850040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666850040 is an abundant number, since it is smaller than the sum of its proper divisors (3750413760).

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

1666850040 is a wasteful number, since it uses less digits than its factorization.

1666850040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630156 (or 4630149 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1666850040 is about 40827.0748401107. The cubic root of 1666850040 is about 1185.6745825275.

The spelling of 1666850040 in words is "one billion, six hundred sixty-six million, eight hundred fifty thousand, forty".