216665742934 has 32 divisors (see below), whose sum is σ = 356008608000. Its totient is φ = 98451333120.

The previous prime is 216665742913. The next prime is 216665742961. The reversal of 216665742934 is 439247566612.

It is a happy number.

216665742934 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216665742934² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244332 + ... + 702160.

It is an arithmetic number, because the mean of its divisors is an integer number (11125269000).

Almost surely, 2^216665742934 is an apocalyptic number.

216665742934 is a deficient number, since it is larger than the sum of its proper divisors (139342865066).

216665742934 is a wasteful number, since it uses less digits than its factorization.

216665742934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458328.

The product of its digits is 13063680, while the sum is 55.

The spelling of 216665742934 in words is "two hundred sixteen billion, six hundred sixty-five million, seven hundred forty-two thousand, nine hundred thirty-four".