67715484921 has 48 divisors (see below), whose sum is σ = 115988955264. Its totient is φ = 38673033984.

The previous prime is 67715484887. The next prime is 67715484989. The reversal of 67715484921 is 12948451776.

67715484921 is a `hidden beast` number, since 6 + 7 + 7 + 1 + 548 + 4 + 92 + 1 = 666.

67715484921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 67715484921 - 2¹⁹ = 67714960633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67715484721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3345985 + ... + 3366161.

It is an arithmetic number, because the mean of its divisors is an integer number (2416436568).

Almost surely, 2^67715484921 is an apocalyptic number.

It is an amenable number.

67715484921 is a deficient number, since it is larger than the sum of its proper divisors (48273470343).

67715484921 is a wasteful number, since it uses less digits than its factorization.

67715484921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22172 (or 22160 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 67715484921 in words is "sixty-seven billion, seven hundred fifteen million, four hundred eighty-four thousand, nine hundred twenty-one".