9461661680 has 40 divisors (see below), whose sum is σ = 22010769792. Its totient is φ = 3782530304.

The previous prime is 9461661637. The next prime is 9461661689. The reversal of 9461661680 is 861661649.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9461661689) 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, 113402 + ... + 178278.

Almost surely, 2^9461661680 is an apocalyptic number.

It is an amenable number.

9461661680 is an abundant number, since it is smaller than the sum of its proper divisors (12549108112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9461661680 is a wasteful number, since it uses less digits than its factorization.

9461661680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66713 (or 66707 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 9461661680 is about 97271.0731923936. The cubic root of 9461661680 is about 2115.0589271325.

The spelling of 9461661680 in words is "nine billion, four hundred sixty-one million, six hundred sixty-one thousand, six hundred eighty".