216690886686606 has 32 divisors (see below), whose sum is σ = 433574246181888. Its totient is φ = 72198223819200.

The previous prime is 216690886686551. The next prime is 216690886686611. The reversal of 216690886686606 is 606686688096612.

216690886686606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122558595 + ... + 124314081.

It is an arithmetic number, because the mean of its divisors is an integer number (13549195193184).

Almost surely, 2^{216690886686606} is an apocalyptic number.

216690886686606 is an abundant number, since it is smaller than the sum of its proper divisors (216883359495282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216690886686606 is a wasteful number, since it uses less digits than its factorization.

216690886686606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764616.

The product of its (nonzero) digits is 2579890176, while the sum is 78.

The spelling of 216690886686606 in words is "two hundred sixteen trillion, six hundred ninety billion, eight hundred eighty-six million, six hundred eighty-six thousand, six hundred six".