16649906 has 32 divisors (see below), whose sum is σ = 31382400. Its totient is φ = 6583248.

The previous prime is 16649879. The next prime is 16649911. The reversal of 16649906 is 60994661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7985 + ... + 9851.

It is an arithmetic number, because the mean of its divisors is an integer number (980700).

Almost surely, 2^16649906 is an apocalyptic number.

16649906 is a deficient number, since it is larger than the sum of its proper divisors (14732494).

16649906 is a wasteful number, since it uses less digits than its factorization.

16649906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 16649906 is about 4080.4296342420. The cubic root of 16649906 is about 255.3508230325.

The spelling of 16649906 in words is "sixteen million, six hundred forty-nine thousand, nine hundred six".