165639002 has 4 divisors (see below), whose sum is σ = 248458506. Its totient is φ = 82819500.

The previous prime is 165638999. The next prime is 165639049. The reversal of 165639002 is 200936561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200936561 = 7 ⋅28705223.

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 20894041 = 12031^2 + 4571^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165639002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41409749 + ... + 41409752.

Almost surely, 2^165639002 is an apocalyptic number.

165639002 is a deficient number, since it is larger than the sum of its proper divisors (82819504).

165639002 is an equidigital number, since it uses as much as digits as its factorization.

165639002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82819503.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 165639002 is about 12870.0816625226. The cubic root of 165639002 is about 549.1877840656.

The spelling of 165639002 in words is "one hundred sixty-five million, six hundred thirty-nine thousand, two".