16669920 has 48 divisors (see below), whose sum is σ = 52511760. Its totient is φ = 4445184.

The previous prime is 16669889. The next prime is 16669927. The reversal of 16669920 is 2996661.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16669927) 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, 16885 + ... + 17844.

It is an arithmetic number, because the mean of its divisors is an integer number (1093995).

Almost surely, 2^16669920 is an apocalyptic number.

16669920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16669920 is an abundant number, since it is smaller than the sum of its proper divisors (35841840).

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

16669920 is a wasteful number, since it uses less digits than its factorization.

16669920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34747 (or 34739 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 16669920 is about 4082.8813355276. The cubic root of 16669920 is about 255.4530967833.

The spelling of 16669920 in words is "sixteen million, six hundred sixty-nine thousand, nine hundred twenty".