1668086392 has 32 divisors (see below), whose sum is σ = 3671082720. Its totient is φ = 695571840.

The previous prime is 1668086369. The next prime is 1668086489. The reversal of 1668086392 is 2936808661.

It is a happy number.

It is a super-2 number, since 2×1668086392² = 5565024422351155328, which contains 22 as substring.

It is a congruent number.

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, 400459 + ... + 404602.

It is an arithmetic number, because the mean of its divisors is an integer number (114721335).

Almost surely, 2^1668086392 is an apocalyptic number.

It is an amenable number.

1668086392 is an abundant number, since it is smaller than the sum of its proper divisors (2002996328).

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

1668086392 is a wasteful number, since it uses less digits than its factorization.

1668086392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805111 (or 805107 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 1668086392 is about 40842.2133582400. The cubic root of 1668086392 is about 1185.9676600528.

The spelling of 1668086392 in words is "one billion, six hundred sixty-eight million, eighty-six thousand, three hundred ninety-two".