1665150389 has 12 divisors (see below), whose sum is σ = 2021230944. Its totient is φ = 1365215544.

The previous prime is 1665150359. The next prime is 1665150407. The reversal of 1665150389 is 9830515661.

It is not a de Polignac number, because 1665150389 - 2²⁴ = 1648373173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665150349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 737627 + ... + 739880.

It is an arithmetic number, because the mean of its divisors is an integer number (168435912).

Almost surely, 2^1665150389 is an apocalyptic number.

It is an amenable number.

1665150389 is a deficient number, since it is larger than the sum of its proper divisors (356080555).

1665150389 is a wasteful number, since it uses less digits than its factorization.

1665150389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477544 (or 1477537 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1665150389 is about 40806.2542877927. The cubic root of 1665150389 is about 1185.2714432142.

The spelling of 1665150389 in words is "one billion, six hundred sixty-five million, one hundred fifty thousand, three hundred eighty-nine".