165663037 has 4 divisors (see below), whose sum is σ = 167271520. Its totient is φ = 164054556.

The previous prime is 165663031. The next prime is 165663077. The reversal of 165663037 is 730366561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165663037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165662987 and 165663005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165663031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804087 + ... + 804292.

It is an arithmetic number, because the mean of its divisors is an integer number (41817880).

Almost surely, 2^165663037 is an apocalyptic number.

It is an amenable number.

165663037 is a deficient number, since it is larger than the sum of its proper divisors (1608483).

165663037 is a wasteful number, since it uses less digits than its factorization.

165663037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608482.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 165663037 is about 12871.0153834109. The cubic root of 165663037 is about 549.2143460263.

The spelling of 165663037 in words is "one hundred sixty-five million, six hundred sixty-three thousand, thirty-seven".