1661001662 has 16 divisors (see below), whose sum is σ = 2557911312. Its totient is φ = 808604160.

The previous prime is 1661001599. The next prime is 1661001739. The reversal of 1661001662 is 2661001661.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 45923 + ... + 73694.

It is an arithmetic number, because the mean of its divisors is an integer number (159869457).

Almost surely, 2^1661001662 is an apocalyptic number.

1661001662 is a deficient number, since it is larger than the sum of its proper divisors (896909650).

1661001662 is a wasteful number, since it uses less digits than its factorization.

1661001662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119803.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1661001662 is about 40755.3881345768. The cubic root of 1661001662 is about 1184.2862554874.

Subtracting 1661001662 from its reverse (2661001661), we obtain a palindrome (999999999).

The spelling of 1661001662 in words is "one billion, six hundred sixty-one million, one thousand, six hundred sixty-two".