67641468406 has 4 divisors (see below), whose sum is σ = 101462202612. Its totient is φ = 33820734202.

The previous prime is 67641468403. The next prime is 67641468421. The reversal of 67641468406 is 60486414676.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67641468403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16910367100 + ... + 16910367103.

It is an arithmetic number, because the mean of its divisors is an integer number (25365550653).

Almost surely, 2^67641468406 is an apocalyptic number.

67641468406 is a deficient number, since it is larger than the sum of its proper divisors (33820734206).

67641468406 is a wasteful number, since it uses less digits than its factorization.

67641468406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33820734205.

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 67641468406 in words is "sixty-seven billion, six hundred forty-one million, four hundred sixty-eight thousand, four hundred six".