165764066 has 16 divisors (see below), whose sum is σ = 274305528. Its totient is φ = 74640000.

The previous prime is 165764063. The next prime is 165764069. The reversal of 165764066 is 660467561.

It is an interprime number because it is at equal distance from previous prime (165764063) and next prime (165764069).

It can be written as a sum of positive squares in 4 ways, for example, as 80478841 + 85285225 = 8971^2 + 9235^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (165764063) 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, 76685 + ... + 78816.

Almost surely, 2^165764066 is an apocalyptic number.

165764066 is a deficient number, since it is larger than the sum of its proper divisors (108541462).

165764066 is a wasteful number, since it uses less digits than its factorization.

165764066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155557.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 165764066 is about 12874.9394561683. The cubic root of 165764066 is about 549.3259687949.

The spelling of 165764066 in words is "one hundred sixty-five million, seven hundred sixty-four thousand, sixty-six".