1666700408 has 16 divisors (see below), whose sum is σ = 3125715480. Its totient is φ = 833176288.

The previous prime is 1666700407. The next prime is 1666700411. The reversal of 1666700408 is 8040076661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666700407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24866 + ... + 62862.

Almost surely, 2^1666700408 is an apocalyptic number.

It is an amenable number.

1666700408 is a deficient number, since it is larger than the sum of its proper divisors (1459015072).

1666700408 is a wasteful number, since it uses less digits than its factorization.

1666700408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43486 (or 43482 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1666700408 is about 40825.2422895443. The cubic root of 1666700408 is about 1185.6391023975.

The spelling of 1666700408 in words is "one billion, six hundred sixty-six million, seven hundred thousand, four hundred eight".