1001666602 has 4 divisors (see below), whose sum is σ = 1502499906. Its totient is φ = 500833300.

The previous prime is 1001666597. The next prime is 1001666621. The reversal of 1001666602 is 2066661001.

1001666602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 617075281 + 384591321 = 24841^2 + 19611^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250416649 + ... + 250416652.

Almost surely, 2^1001666602 is an apocalyptic number.

1001666602 is a deficient number, since it is larger than the sum of its proper divisors (500833304).

1001666602 is an equidigital number, since it uses as much as digits as its factorization.

1001666602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500833303.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1001666602 is about 31649.1169229096. The cubic root of 1001666602 is about 1000.5552256674. Note that the first 3 decimals are identical.

The spelling of 1001666602 in words is "one billion, one million, six hundred sixty-six thousand, six hundred two".