67148667148661 has 32 divisors (see below), whose sum is σ = 78241305784320. Its totient is φ = 56432480929344.

The previous prime is 67148667148571. The next prime is 67148667148679. The reversal of 67148667148661 is 16684176684176.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67148667148661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67148669148661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4103681066 + ... + 4103697428.

It is an arithmetic number, because the mean of its divisors is an integer number (2445040805760).

Almost surely, 2^{67148667148661} is an apocalyptic number.

It is an amenable number.

67148667148661 is a deficient number, since it is larger than the sum of its proper divisors (11092638635659).

67148667148661 is a wasteful number, since it uses less digits than its factorization.

67148667148661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23105.

The product of its digits is 390168576, while the sum is 71.

The spelling of 67148667148661 in words is "sixty-seven trillion, one hundred forty-eight billion, six hundred sixty-seven million, one hundred forty-eight thousand, six hundred sixty-one".