9906651 has 16 divisors (see below), whose sum is σ = 14773120. Its totient is φ = 6561000.

The previous prime is 9906599. The next prime is 9906653. The reversal of 9906651 is 1566099.

It is not a de Polignac number, because 9906651 - 2¹⁰ = 9905627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9906653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276 + ... + 5526.

It is an arithmetic number, because the mean of its divisors is an integer number (923320).

Almost surely, 2^9906651 is an apocalyptic number.

9906651 is a deficient number, since it is larger than the sum of its proper divisors (4866469).

9906651 is a wasteful number, since it uses less digits than its factorization.

9906651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 9906651 is about 3147.4832803368. The cubic root of 9906651 is about 214.7709910577.

The spelling of 9906651 in words is "nine million, nine hundred six thousand, six hundred fifty-one".