667216213755 has 64 divisors (see below), whose sum is σ = 1316778989568. Its totient is φ = 280934231040.

The previous prime is 667216213747. The next prime is 667216213759. The reversal of 667216213755 is 557312612766.

It is not a de Polignac number, because 667216213755 - 2³ = 667216213747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667216213698 and 667216213707.

It is not an unprimeable number, because it can be changed into a prime (667216213759) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89010 + ... + 1158600.

It is an arithmetic number, because the mean of its divisors is an integer number (20574671712).

Almost surely, 2^667216213755 is an apocalyptic number.

667216213755 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

667216213755 is a deficient number, since it is larger than the sum of its proper divisors (649562775813).

667216213755 is a wasteful number, since it uses less digits than its factorization.

667216213755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070076.

The product of its digits is 3175200, while the sum is 51.

The spelling of 667216213755 in words is "six hundred sixty-seven billion, two hundred sixteen million, two hundred thirteen thousand, seven hundred fifty-five".