1665122002 has 8 divisors (see below), whose sum is σ = 2538628812. Its totient is φ = 818912400.

The previous prime is 1665121951. The next prime is 1665122021. The reversal of 1665122002 is 2002215661.

It can be written as a sum of positive squares in 2 ways, for example, as 1658199841 + 6922161 = 40721^2 + 2631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6824149 + ... + 6824392.

Almost surely, 2^1665122002 is an apocalyptic number.

1665122002 is a deficient number, since it is larger than the sum of its proper divisors (873506810).

1665122002 is a wasteful number, since it uses less digits than its factorization.

1665122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13648604.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1665122002 is about 40805.9064597271. The cubic root of 1665122002 is about 1185.2647077882.

Adding to 1665122002 its reverse (2002215661), we get a palindrome (3667337663).

The spelling of 1665122002 in words is "one billion, six hundred sixty-five million, one hundred twenty-two thousand, two".