71261313260066 has 4 divisors (see below), whose sum is σ = 106891969890102. Its totient is φ = 35630656630032.

The previous prime is 71261313260063. The next prime is 71261313260069. The reversal of 71261313260066 is 66006231316217.

71261313260066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (71261313260063) and next prime (71261313260069).

It can be written as a sum of positive squares in only one way, i.e., 61609548180625 + 9651765079441 = 7849175^2 + 3106729^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71261313259999 and 71261313260026.

It is not an unprimeable number, because it can be changed into a prime (71261313260063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17815328315015 + ... + 17815328315018.

Almost surely, 2^{71261313260066} is an apocalyptic number.

71261313260066 is a deficient number, since it is larger than the sum of its proper divisors (35630656630036).

71261313260066 is a wasteful number, since it uses less digits than its factorization.

71261313260066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35630656630035.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 71261313260066 in words is "seventy-one trillion, two hundred sixty-one billion, three hundred thirteen million, two hundred sixty thousand, sixty-six".