67124121077 has 4 divisors (see below), whose sum is σ = 72287515020. Its totient is φ = 61960727136.

The previous prime is 67124121073. The next prime is 67124121089. The reversal of 67124121077 is 77012142176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14248958161 + 52875162916 = 119369^2 + 229946^2 .

It is a cyclic number.

It is not a de Polignac number, because 67124121077 - 2² = 67124121073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67124121077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67124121073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2581696952 + ... + 2581696977.

It is an arithmetic number, because the mean of its divisors is an integer number (18071878755).

Almost surely, 2^67124121077 is an apocalyptic number.

It is an amenable number.

67124121077 is a deficient number, since it is larger than the sum of its proper divisors (5163393943).

67124121077 is a wasteful number, since it uses less digits than its factorization.

67124121077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163393942.

The product of its (nonzero) digits is 32928, while the sum is 38.

The spelling of 67124121077 in words is "sixty-seven billion, one hundred twenty-four million, one hundred twenty-one thousand, seventy-seven".