1665601106 has 16 divisors (see below), whose sum is σ = 2730747264. Its totient is φ = 757264464.

The previous prime is 1665601103. The next prime is 1665601117. The reversal of 1665601106 is 6011065661.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1665601103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476330 + ... + 479813.

It is an arithmetic number, because the mean of its divisors is an integer number (170671704).

Almost surely, 2^1665601106 is an apocalyptic number.

1665601106 is a deficient number, since it is larger than the sum of its proper divisors (1065146158).

1665601106 is a wasteful number, since it uses less digits than its factorization.

1665601106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956225.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1665601106 is about 40811.7765602038. The cubic root of 1665601106 is about 1185.3783752566.

Adding to 1665601106 its reverse (6011065661), we get a palindrome (7676666767).

The spelling of 1665601106 in words is "one billion, six hundred sixty-five million, six hundred one thousand, one hundred six".