16669731 has 8 divisors (see below), whose sum is σ = 23936080. Its totient is φ = 10258272.

The previous prime is 16669703. The next prime is 16669777. The reversal of 16669731 is 13796661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16669731 - 2¹⁷ = 16538659 is a prime.

It is a super-2 number, since 2×16669731² = 555759863224722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 427429 = 16669731 / (1 + 6 + 6 + 6 + 9 + 7 + 3 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16669731.

It is not an unprimeable number, because it can be changed into a prime (16669831) 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, 213676 + ... + 213753.

It is an arithmetic number, because the mean of its divisors is an integer number (2992010).

Almost surely, 2^16669731 is an apocalyptic number.

16669731 is a deficient number, since it is larger than the sum of its proper divisors (7266349).

16669731 is a wasteful number, since it uses less digits than its factorization.

16669731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427445.

The product of its digits is 40824, while the sum is 39.

The square root of 16669731 is about 4082.8581900429. The cubic root of 16669731 is about 255.4521313554.

The spelling of 16669731 in words is "sixteen million, six hundred sixty-nine thousand, seven hundred thirty-one".