1002217661 has 8 divisors (see below), whose sum is σ = 1011830400. Its totient is φ = 992639520.

The previous prime is 1002217639. The next prime is 1002217669. The reversal of 1002217661 is 1667122001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002217661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1002217661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002217669) 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, 51545 + ... + 68273.

It is an arithmetic number, because the mean of its divisors is an integer number (126478800).

Almost surely, 2^1002217661 is an apocalyptic number.

It is an amenable number.

1002217661 is a deficient number, since it is larger than the sum of its proper divisors (9612739).

1002217661 is a wasteful number, since it uses less digits than its factorization.

1002217661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17299.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1002217661 is about 31657.8214822183. The cubic root of 1002217661 is about 1000.7386745589.

Adding to 1002217661 its reverse (1667122001), we get a palindrome (2669339662).

The spelling of 1002217661 in words is "one billion, two million, two hundred seventeen thousand, six hundred sixty-one".