16040669 has 2 divisors, whose sum is σ = 16040670. Its totient is φ = 16040668.

The previous prime is 16040659. The next prime is 16040681. The reversal of 16040669 is 96604061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13235044 + 2805625 = 3638^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 16040669 - 2⁴ = 16040653 is a prime.

It is a super-2 number, since 2×16040669² = 514606123935122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16040659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8020334 + 8020335.

It is an arithmetic number, because the mean of its divisors is an integer number (8020335).

Almost surely, 2^16040669 is an apocalyptic number.

It is an amenable number.

16040669 is a deficient number, since it is larger than the sum of its proper divisors (1).

16040669 is an equidigital number, since it uses as much as digits as its factorization.

16040669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 16040669 is about 4005.0803986936. The cubic root of 16040669 is about 252.1975282142.

The spelling of 16040669 in words is "sixteen million, forty thousand, six hundred sixty-nine".