67408271661 has 8 divisors (see below), whose sum is σ = 91401046560. Its totient is φ = 44177172272.

The previous prime is 67408271659. The next prime is 67408271681. The reversal of 67408271661 is 16617280476.

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

It is a cyclic number.

It is not a de Polignac number, because 67408271661 - 2¹ = 67408271659 is a prime.

It is a super-3 number, since 3×67408271661³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67408271661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67408271621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190418670 + ... + 190419023.

It is an arithmetic number, because the mean of its divisors is an integer number (11425130820).

Almost surely, 2^67408271661 is an apocalyptic number.

It is an amenable number.

67408271661 is a deficient number, since it is larger than the sum of its proper divisors (23992774899).

67408271661 is a wasteful number, since it uses less digits than its factorization.

67408271661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380837755.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 67408271661 in words is "sixty-seven billion, four hundred eight million, two hundred seventy-one thousand, six hundred sixty-one".