66713421454 has 4 divisors (see below), whose sum is σ = 100070132184. Its totient is φ = 33356710726.

The previous prime is 66713421451. The next prime is 66713421473. The reversal of 66713421454 is 45412431766.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66713421454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66713421451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16678355362 + ... + 16678355365.

It is an arithmetic number, because the mean of its divisors is an integer number (25017533046).

Almost surely, 2^66713421454 is an apocalyptic number.

66713421454 is a deficient number, since it is larger than the sum of its proper divisors (33356710730).

66713421454 is a wasteful number, since it uses less digits than its factorization.

66713421454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33356710729.

The product of its digits is 483840, while the sum is 43.

The spelling of 66713421454 in words is "sixty-six billion, seven hundred thirteen million, four hundred twenty-one thousand, four hundred fifty-four".