71666762454 has 48 divisors (see below), whose sum is σ = 186800590080. Its totient is φ = 19398521520.

The previous prime is 71666762437. The next prime is 71666762477. The reversal of 71666762454 is 45426766617.

It is a super-2 number, since 2×71666762454² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71666762454.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 14965602 + ... + 14970389.

It is an arithmetic number, because the mean of its divisors is an integer number (3891678960).

Almost surely, 2^71666762454 is an apocalyptic number.

71666762454 is an abundant number, since it is smaller than the sum of its proper divisors (115133827626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71666762454 is a wasteful number, since it uses less digits than its factorization.

71666762454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29936025 (or 29936022 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 71666762454 in words is "seventy-one billion, six hundred sixty-six million, seven hundred sixty-two thousand, four hundred fifty-four".