216610661707 has 16 divisors (see below), whose sum is σ = 242375253120. Its totient is φ = 191880057600.

The previous prime is 216610661681. The next prime is 216610661713. The reversal of 216610661707 is 707166016612.

It is not a de Polignac number, because 216610661707 - 2³⁵ = 182250923339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (216610661797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348294 + ... + 744667.

It is an arithmetic number, because the mean of its divisors is an integer number (15148453320).

Almost surely, 2^216610661707 is an apocalyptic number.

216610661707 is a deficient number, since it is larger than the sum of its proper divisors (25764591413).

216610661707 is a wasteful number, since it uses less digits than its factorization.

216610661707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093434.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 216610661707 in words is "two hundred sixteen billion, six hundred ten million, six hundred sixty-one thousand, seven hundred seven".