1662943379 has 6 divisors (see below), whose sum is σ = 1691447460. Its totient is φ = 1634449976.

The previous prime is 1662943367. The next prime is 1662943393. The reversal of 1662943379 is 9733492661.

It is not a de Polignac number, because 1662943379 - 2⁸ = 1662943123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662943679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 310577 + ... + 315885.

It is an arithmetic number, because the mean of its divisors is an integer number (281907910).

Almost surely, 2^1662943379 is an apocalyptic number.

1662943379 is a deficient number, since it is larger than the sum of its proper divisors (28504081).

1662943379 is an frugal number, since it uses more digits than its factorization.

1662943379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10677 (or 5368 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 50.

The square root of 1662943379 is about 40779.2027754344. The cubic root of 1662943379 is about 1184.7475540980.

The spelling of 1662943379 in words is "one billion, six hundred sixty-two million, nine hundred forty-three thousand, three hundred seventy-nine".