16697966 has 4 divisors (see below), whose sum is σ = 25046952. Its totient is φ = 8348982.

The previous prime is 16697951. The next prime is 16697969. The reversal of 16697966 is 66979661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66979661 = 7 ⋅9568523.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16697969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4174490 + ... + 4174493.

It is an arithmetic number, because the mean of its divisors is an integer number (6261738).

Almost surely, 2^16697966 is an apocalyptic number.

16697966 is a deficient number, since it is larger than the sum of its proper divisors (8348986).

16697966 is an equidigital number, since it uses as much as digits as its factorization.

16697966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8348985.

The product of its digits is 734832, while the sum is 50.

The square root of 16697966 is about 4086.3144763956. The cubic root of 16697966 is about 255.5962773027.

The spelling of 16697966 in words is "sixteen million, six hundred ninety-seven thousand, nine hundred sixty-six".