67336645421 has 8 divisors (see below), whose sum is σ = 67938502464. Its totient is φ = 66734893120.

The previous prime is 67336645367. The next prime is 67336645427. The reversal of 67336645421 is 12454663376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67336645421 - 2²² = 67332451117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67336645427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881920 + ... + 1917366.

It is an arithmetic number, because the mean of its divisors is an integer number (8492312808).

Almost surely, 2^67336645421 is an apocalyptic number.

It is an amenable number.

67336645421 is a deficient number, since it is larger than the sum of its proper divisors (601857043).

67336645421 is a wasteful number, since it uses less digits than its factorization.

67336645421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52371.

The product of its digits is 2177280, while the sum is 47.

The spelling of 67336645421 in words is "sixty-seven billion, three hundred thirty-six million, six hundred forty-five thousand, four hundred twenty-one".