1671666732 has 18 divisors (see below), whose sum is σ = 4225602108. Its totient is φ = 557222232.

The previous prime is 1671666727. The next prime is 1671666757. The reversal of 1671666732 is 2376661761.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23217558 + ... + 23217629.

Almost surely, 2^1671666732 is an apocalyptic number.

1671666732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1671666732 is an abundant number, since it is smaller than the sum of its proper divisors (2553935376).

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

1671666732 is a wasteful number, since it uses less digits than its factorization.

1671666732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46435197 (or 46435192 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 1671666732 is about 40886.0212297553. The cubic root of 1671666732 is about 1186.8155644005.

The spelling of 1671666732 in words is "one billion, six hundred seventy-one million, six hundred sixty-six thousand, seven hundred thirty-two".