67703872421 has 4 divisors (see below), whose sum is σ = 70647519072. Its totient is φ = 64760225772.

The previous prime is 67703872403. The next prime is 67703872447. The reversal of 67703872421 is 12427830776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67703872421 - 2¹⁰ = 67703871397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67703872021) 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, 1471823291 + ... + 1471823336.

It is an arithmetic number, because the mean of its divisors is an integer number (17661879768).

Almost surely, 2^67703872421 is an apocalyptic number.

It is an amenable number.

67703872421 is a deficient number, since it is larger than the sum of its proper divisors (2943646651).

67703872421 is a wasteful number, since it uses less digits than its factorization.

67703872421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943646650.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 67703872421 in words is "sixty-seven billion, seven hundred three million, eight hundred seventy-two thousand, four hundred twenty-one".