689042171966 has 8 divisors (see below), whose sum is σ = 1033586622264. Its totient is φ = 344513297880.

The previous prime is 689042171957. The next prime is 689042171977. The reversal of 689042171966 is 669171240986.

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

It is a super-2 number, since 2×689042171966² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3782825 + ... + 3960788.

It is an arithmetic number, because the mean of its divisors is an integer number (129198327783).

Almost surely, 2^689042171966 is an apocalyptic number.

689042171966 is a deficient number, since it is larger than the sum of its proper divisors (344544450298).

689042171966 is a wasteful number, since it uses less digits than its factorization.

689042171966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7788106.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 689042171966 in words is "six hundred eighty-nine billion, forty-two million, one hundred seventy-one thousand, nine hundred sixty-six".