9661654 has 4 divisors (see below), whose sum is σ = 14492484. Its totient is φ = 4830826.

The previous prime is 9661637. The next prime is 9661667. The reversal of 9661654 is 4561669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4561669 = 7 ⋅651667.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2415412 + ... + 2415415.

It is an arithmetic number, because the mean of its divisors is an integer number (3623121).

Almost surely, 2^9661654 is an apocalyptic number.

9661654 is a deficient number, since it is larger than the sum of its proper divisors (4830830).

9661654 is a wasteful number, since it uses less digits than its factorization.

9661654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830829.

The product of its digits is 38880, while the sum is 37.

The square root of 9661654 is about 3108.3201250836. The cubic root of 9661654 is about 212.9857235099.

The spelling of 9661654 in words is "nine million, six hundred sixty-one thousand, six hundred fifty-four".