67542113661 has 16 divisors (see below), whose sum is σ = 98249156928. Its totient is φ = 40932080000.

The previous prime is 67542113657. The next prime is 67542113701. The reversal of 67542113661 is 16631124576.

It is a cyclic number.

It is not a de Polignac number, because 67542113661 - 2² = 67542113657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67542113621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573175 + ... + 680891.

It is an arithmetic number, because the mean of its divisors is an integer number (6140572308).

Almost surely, 2^67542113661 is an apocalyptic number.

It is an amenable number.

67542113661 is a deficient number, since it is larger than the sum of its proper divisors (30707043267).

67542113661 is a wasteful number, since it uses less digits than its factorization.

67542113661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126732.

The product of its digits is 181440, while the sum is 42.

The spelling of 67542113661 in words is "sixty-seven billion, five hundred forty-two million, one hundred thirteen thousand, six hundred sixty-one".