71766660145 has 32 divisors (see below), whose sum is σ = 89376408576. Its totient is φ = 55283904000.

The previous prime is 71766660137. The next prime is 71766660149. The reversal of 71766660145 is 54106666717.

It is not a de Polignac number, because 71766660145 - 2³ = 71766660137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71766660149) 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, 4852552 + ... + 4867318.

It is an arithmetic number, because the mean of its divisors is an integer number (2793012768).

Almost surely, 2^71766660145 is an apocalyptic number.

It is an amenable number.

71766660145 is a deficient number, since it is larger than the sum of its proper divisors (17609748431).

71766660145 is a wasteful number, since it uses less digits than its factorization.

71766660145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15121.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 71766660145 in words is "seventy-one billion, seven hundred sixty-six million, six hundred sixty thousand, one hundred forty-five".