16966961 has 4 divisors (see below), whose sum is σ = 18509424. Its totient is φ = 15424500.

The previous prime is 16966927. The next prime is 16966973.

16966961 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16966961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16966921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771215 + ... + 771236.

It is an arithmetic number, because the mean of its divisors is an integer number (4627356).

Almost surely, 2^16966961 is an apocalyptic number.

16966961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16966961 is a deficient number, since it is larger than the sum of its proper divisors (1542463).

16966961 is a wasteful number, since it uses less digits than its factorization.

16966961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542462.

The product of its digits is 104976, while the sum is 44.

The square root of 16966961 is about 4119.0971098045. The cubic root of 16966961 is about 256.9614773673.

The spelling of 16966961 in words is "sixteen million, nine hundred sixty-six thousand, nine hundred sixty-one".