96666721 has 8 divisors (see below), whose sum is σ = 98576640. Its totient is φ = 94765968.

The previous prime is 96666701. The next prime is 96666763. The reversal of 96666721 is 12766669.

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

It is a cyclic number.

It is not a de Polignac number, because 96666721 - 2⁷ = 96666593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96666701) 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, 21360 + ... + 25486.

It is an arithmetic number, because the mean of its divisors is an integer number (12322080).

Almost surely, 2^96666721 is an apocalyptic number.

It is an amenable number.

96666721 is a deficient number, since it is larger than the sum of its proper divisors (1909919).

96666721 is a wasteful number, since it uses less digits than its factorization.

96666721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583.

The product of its digits is 163296, while the sum is 43.

The square root of 96666721 is about 9831.9235656101. The cubic root of 96666721 is about 458.9432595044.

The spelling of 96666721 in words is "ninety-six million, six hundred sixty-six thousand, seven hundred twenty-one".