16671620 has 24 divisors (see below), whose sum is σ = 40012224. Its totient is φ = 5715936.

The previous prime is 16671559. The next prime is 16671631. The reversal of 16671620 is 2617661.

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 in 7 ways as a sum of consecutive naturals, for example, 59402 + ... + 59681.

It is an arithmetic number, because the mean of its divisors is an integer number (1667176).

Almost surely, 2^16671620 is an apocalyptic number.

16671620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16671620 is an abundant number, since it is smaller than the sum of its proper divisors (23340604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16671620 is a wasteful number, since it uses less digits than its factorization.

16671620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119099 (or 119097 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 16671620 is about 4083.0895165303. The cubic root of 16671620 is about 255.4617801984.

The spelling of 16671620 in words is "sixteen million, six hundred seventy-one thousand, six hundred twenty".