71667053261749 has 32 divisors (see below), whose sum is σ = 90142862428800. Its totient is φ = 56088892016640.

The previous prime is 71667053261717. The next prime is 71667053261801. The reversal of 71667053261749 is 94716235076617.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71667053261749 - 2⁵ = 71667053261717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71667053261549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347670352 + ... + 347876425.

It is an arithmetic number, because the mean of its divisors is an integer number (2816964450900).

Almost surely, 2^{71667053261749} is an apocalyptic number.

It is an amenable number.

71667053261749 is a deficient number, since it is larger than the sum of its proper divisors (18475809167051).

71667053261749 is a wasteful number, since it uses less digits than its factorization.

71667053261749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695546853.

The product of its (nonzero) digits is 80015040, while the sum is 64.

The spelling of 71667053261749 in words is "seventy-one trillion, six hundred sixty-seven billion, fifty-three million, two hundred sixty-one thousand, seven hundred forty-nine".