67661063255 has 8 divisors (see below), whose sum is σ = 82725224832. Its totient is φ = 53107551328.

The previous prime is 67661063243. The next prime is 67661063269. The reversal of 67661063255 is 55236016676.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67661063255 is a prime.

It is a super-2 number, since 2×67661063255² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127662119 + ... + 127662648.

It is an arithmetic number, because the mean of its divisors is an integer number (10340653104).

Almost surely, 2^67661063255 is an apocalyptic number.

67661063255 is a deficient number, since it is larger than the sum of its proper divisors (15064161577).

67661063255 is a wasteful number, since it uses less digits than its factorization.

67661063255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255324825.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 67661063255 in words is "sixty-seven billion, six hundred sixty-one million, sixty-three thousand, two hundred fifty-five".