216690886686607 has 16 divisors (see below), whose sum is σ = 230236800278400. Its totient is φ = 203939500976640.

The previous prime is 216690886686551. The next prime is 216690886686611. The reversal of 216690886686607 is 706686688096612.

It is not a de Polignac number, because 216690886686607 - 2³¹ = 216688739202959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216690886686647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214484007 + ... + 215491927.

It is an arithmetic number, because the mean of its divisors is an integer number (14389800017400).

Almost surely, 2^{216690886686607} is an apocalyptic number.

216690886686607 is a deficient number, since it is larger than the sum of its proper divisors (13545913591793).

216690886686607 is an equidigital number, since it uses as much as digits as its factorization.

216690886686607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051731 (or 1051697 counting only the distinct ones).

The product of its (nonzero) digits is 3009871872, while the sum is 79.

The spelling of 216690886686607 in words is "two hundred sixteen trillion, six hundred ninety billion, eight hundred eighty-six million, six hundred eighty-six thousand, six hundred seven".