667705741381 has 16 divisors (see below), whose sum is σ = 763874587008. Its totient is φ = 571732761600.

The previous prime is 667705741349. The next prime is 667705741387. The reversal of 667705741381 is 183147507766.

It is not a de Polignac number, because 667705741381 - 2⁵ = 667705741349 is a prime.

It is a super-2 number, since 2×667705741381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667705741387) by changing a digit.

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, 34833906 + ... + 34853068.

It is an arithmetic number, because the mean of its divisors is an integer number (47742161688).

Almost surely, 2^667705741381 is an apocalyptic number.

It is an amenable number.

667705741381 is a deficient number, since it is larger than the sum of its proper divisors (96168845627).

667705741381 is a wasteful number, since it uses less digits than its factorization.

667705741381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24012.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 667705741381 in words is "six hundred sixty-seven billion, seven hundred five million, seven hundred forty-one thousand, three hundred eighty-one".