162807661 has 4 divisors (see below), whose sum is σ = 162979452. Its totient is φ = 162635872.

The previous prime is 162807641. The next prime is 162807683. The reversal of 162807661 is 166708261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84750436 + 78057225 = 9206^2 + 8835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162807661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 162807661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162807641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84466 + ... + 86371.

It is an arithmetic number, because the mean of its divisors is an integer number (40744863).

Almost surely, 2^162807661 is an apocalyptic number.

It is an amenable number.

162807661 is a deficient number, since it is larger than the sum of its proper divisors (171791).

162807661 is an equidigital number, since it uses as much as digits as its factorization.

162807661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171790.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 162807661 is about 12759.6105348087. The cubic root of 162807661 is about 546.0406131597.

The spelling of 162807661 in words is "one hundred sixty-two million, eight hundred seven thousand, six hundred sixty-one".