1665158052 has 12 divisors (see below), whose sum is σ = 3885368816. Its totient is φ = 555052680.

The previous prime is 1665158039. The next prime is 1665158069. The reversal of 1665158052 is 2508515661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1665158052.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69381574 + ... + 69381597.

Almost surely, 2^1665158052 is an apocalyptic number.

1665158052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1665158052 is an abundant number, since it is smaller than the sum of its proper divisors (2220210764).

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

1665158052 is a wasteful number, since it uses less digits than its factorization.

1665158052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138763178 (or 138763176 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 1665158052 is about 40806.3481826051. The cubic root of 1665158052 is about 1185.2732614126.

The spelling of 1665158052 in words is "one billion, six hundred sixty-five million, one hundred fifty-eight thousand, fifty-two".