1217867966 has 16 divisors (see below), whose sum is σ = 2197656960. Its totient is φ = 494472600.

The previous prime is 1217867951. The next prime is 1217868013. The reversal of 1217867966 is 6697687121.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2288960 + ... + 2289491.

It is an arithmetic number, because the mean of its divisors is an integer number (137353560).

Almost surely, 2^1217867966 is an apocalyptic number.

1217867966 is a deficient number, since it is larger than the sum of its proper divisors (979788994).

1217867966 is a wasteful number, since it uses less digits than its factorization.

1217867966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578479.

The product of its digits is 1524096, while the sum is 53.

The square root of 1217867966 is about 34897.9650696140. The cubic root of 1217867966 is about 1067.9069241176.

The spelling of 1217867966 in words is "one billion, two hundred seventeen million, eight hundred sixty-seven thousand, nine hundred sixty-six".