1664427876 has 24 divisors (see below), whose sum is σ = 3900630720. Its totient is φ = 552385632.

The previous prime is 1664427871. The next prime is 1664427887. The reversal of 1664427876 is 6787244661.

It is not an unprimeable number, because it can be changed into a prime (1664427871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300096 + ... + 305591.

It is an arithmetic number, because the mean of its divisors is an integer number (162526280).

Almost surely, 2^1664427876 is an apocalyptic number.

It is an amenable number.

1664427876 is an abundant number, since it is smaller than the sum of its proper divisors (2236202844).

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

1664427876 is a wasteful number, since it uses less digits than its factorization.

1664427876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605923 (or 605921 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 51.

The square root of 1664427876 is about 40797.4003583562. The cubic root of 1664427876 is about 1185.0999876463.

The spelling of 1664427876 in words is "one billion, six hundred sixty-four million, four hundred twenty-seven thousand, eight hundred seventy-six".