67797502121 has 4 divisors (see below), whose sum is σ = 68908936644. Its totient is φ = 66686067600.

The previous prime is 67797502111. The next prime is 67797502147. The reversal of 67797502121 is 12120579776.

67797502121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7276090000 + 60521412121 = 85300^2 + 246011^2 .

It is a cyclic number.

It is not a de Polignac number, because 67797502121 - 2³⁰ = 66723760297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67797502111) 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, 555717170 + ... + 555717291.

It is an arithmetic number, because the mean of its divisors is an integer number (17227234161).

Almost surely, 2^67797502121 is an apocalyptic number.

67797502121 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

67797502121 is a deficient number, since it is larger than the sum of its proper divisors (1111434523).

67797502121 is a wasteful number, since it uses less digits than its factorization.

67797502121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111434522.

The product of its (nonzero) digits is 370440, while the sum is 47.

The spelling of 67797502121 in words is "sixty-seven billion, seven hundred ninety-seven million, five hundred two thousand, one hundred twenty-one".