9724957666 has 16 divisors (see below), whose sum is σ = 14686848000. Its totient is φ = 4829429088.

The previous prime is 9724957657. The next prime is 9724957667. The reversal of 9724957666 is 6667594279.

It is not an unprimeable number, because it can be changed into a prime (9724957667) 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, 204991 + ... + 247933.

It is an arithmetic number, because the mean of its divisors is an integer number (917928000).

Almost surely, 2^9724957666 is an apocalyptic number.

9724957666 is a deficient number, since it is larger than the sum of its proper divisors (4961890334).

9724957666 is a wasteful number, since it uses less digits than its factorization.

9724957666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43713.

The product of its digits is 34292160, while the sum is 61.

The square root of 9724957666 is about 98615.1999744461. The cubic root of 9724957666 is about 2134.4987582456.

The spelling of 9724957666 in words is "nine billion, seven hundred twenty-four million, nine hundred fifty-seven thousand, six hundred sixty-six".