16840669 has 16 divisors (see below), whose sum is σ = 18748800. Its totient is φ = 15054336.

The previous prime is 16840633. The next prime is 16840721. The reversal of 16840669 is 96604861.

It is a cyclic number.

It is not a de Polignac number, because 16840669 - 2⁹ = 16840157 is a prime.

It is a super-2 number, since 2×16840669² = 567216264735122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16840469) 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, 38677 + ... + 39109.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^16840669 is an apocalyptic number.

16840669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16840669 is a deficient number, since it is larger than the sum of its proper divisors (1908131).

16840669 is a wasteful number, since it uses less digits than its factorization.

16840669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 16840669 is about 4103.7384175895. The cubic root of 16840669 is about 256.3223326243.

The spelling of 16840669 in words is "sixteen million, eight hundred forty thousand, six hundred sixty-nine".