1002502661 has 4 divisors (see below), whose sum is σ = 1002576972. Its totient is φ = 1002428352.

The previous prime is 1002502651. The next prime is 1002502693. The reversal of 1002502661 is 1662052001.

1002502661 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 633478561 + 369024100 = 25169^2 + 19210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002502661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002502601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10586 + ... + 46011.

It is an arithmetic number, because the mean of its divisors is an integer number (250644243).

Almost surely, 2^1002502661 is an apocalyptic number.

It is an amenable number.

1002502661 is a deficient number, since it is larger than the sum of its proper divisors (74311).

1002502661 is an equidigital number, since it uses as much as digits as its factorization.

1002502661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74310.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1002502661 is about 31662.3224195573. The cubic root of 1002502661 is about 1000.8335253757.

Adding to 1002502661 its reverse (1662052001), we get a palindrome (2664554662).

The spelling of 1002502661 in words is "one billion, two million, five hundred two thousand, six hundred sixty-one".