9902207661 has 8 divisors (see below), whose sum is σ = 13203422400. Its totient is φ = 6601232352.

The previous prime is 9902207659. The next prime is 9902207803. The reversal of 9902207661 is 1667022099.

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

It is not a de Polignac number, because 9902207661 - 2¹ = 9902207659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902207611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90865 + ... + 167513.

It is an arithmetic number, because the mean of its divisors is an integer number (1650427800).

Almost surely, 2^9902207661 is an apocalyptic number.

It is an amenable number.

9902207661 is a deficient number, since it is larger than the sum of its proper divisors (3301214739).

9902207661 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (9902207660) it forms an eRAP, since the sums of their prime factors are consecutive (119714 and 119715).

9902207661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119715.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 9902207661 is about 99509.8370061975. The cubic root of 9902207661 is about 2147.3887650384.

The spelling of 9902207661 in words is "nine billion, nine hundred two million, two hundred seven thousand, six hundred sixty-one".