9702570661 has 4 divisors (see below), whose sum is σ = 11088652192. Its totient is φ = 8316489132.

The previous prime is 9702570659. The next prime is 9702570721. The reversal of 9702570661 is 1660752079.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9702570661 - 2¹ = 9702570659 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 (9702510661) 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, 693040755 + ... + 693040768.

It is an arithmetic number, because the mean of its divisors is an integer number (2772163048).

Almost surely, 2^9702570661 is an apocalyptic number.

It is an amenable number.

9702570661 is a deficient number, since it is larger than the sum of its proper divisors (1386081531).

9702570661 is a wasteful number, since it uses less digits than its factorization.

9702570661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386081530.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 9702570661 is about 98501.6277073633. The cubic root of 9702570661 is about 2132.8596166239.

The spelling of 9702570661 in words is "nine billion, seven hundred two million, five hundred seventy thousand, six hundred sixty-one".