165963764 has 6 divisors (see below), whose sum is σ = 290436594. Its totient is φ = 82981880.

The previous prime is 165963709. The next prime is 165963773. The reversal of 165963764 is 467369561.

It can be written as a sum of positive squares in only one way, i.e., 107288164 + 58675600 = 10358^2 + 7660^2 .

It is a super-2 number, since 2×165963764² = 55087941922095392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20745467 + ... + 20745474.

It is an arithmetic number, because the mean of its divisors is an integer number (48406099).

Almost surely, 2^165963764 is an apocalyptic number.

It is an amenable number.

165963764 is a deficient number, since it is larger than the sum of its proper divisors (124472830).

165963764 is a wasteful number, since it uses less digits than its factorization.

165963764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41490945 (or 41490943 counting only the distinct ones).

The product of its digits is 816480, while the sum is 47.

The square root of 165963764 is about 12882.6924204531. The cubic root of 165963764 is about 549.5464735107.

The spelling of 165963764 in words is "one hundred sixty-five million, nine hundred sixty-three thousand, seven hundred sixty-four".