71166349454 has 4 divisors (see below), whose sum is σ = 106749524184. Its totient is φ = 35583174726.

The previous prime is 71166349453. The next prime is 71166349459. The reversal of 71166349454 is 45494366117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45494366117 = 89 ⋅511172653.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71166349453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17791587362 + ... + 17791587365.

It is an arithmetic number, because the mean of its divisors is an integer number (26687381046).

Almost surely, 2^71166349454 is an apocalyptic number.

71166349454 is a deficient number, since it is larger than the sum of its proper divisors (35583174730).

71166349454 is a wasteful number, since it uses less digits than its factorization.

71166349454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35583174729.

The product of its digits is 2177280, while the sum is 50.

The spelling of 71166349454 in words is "seventy-one billion, one hundred sixty-six million, three hundred forty-nine thousand, four hundred fifty-four".