71661701055 has 48 divisors (see below), whose sum is σ = 133413554304. Its totient is φ = 32751028800.

The previous prime is 71661701017. The next prime is 71661701099. The reversal of 71661701055 is 55010716617.

It is not a de Polignac number, because 71661701055 - 2¹⁴ = 71661684671 is a prime.

It is a super-2 number, since 2×71661701055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3408004 + ... + 3428966.

It is an arithmetic number, because the mean of its divisors is an integer number (2779449048).

Almost surely, 2^71661701055 is an apocalyptic number.

71661701055 is a deficient number, since it is larger than the sum of its proper divisors (61751853249).

71661701055 is a wasteful number, since it uses less digits than its factorization.

71661701055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25636 (or 25629 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 39.

The spelling of 71661701055 in words is "seventy-one billion, six hundred sixty-one million, seven hundred one thousand, fifty-five".