66013015406541 has 32 divisors (see below), whose sum is σ = 103060960923648. Its totient is φ = 36795876082560.

The previous prime is 66013015406539. The next prime is 66013015406557. The reversal of 66013015406541 is 14560451031066.

It is not a de Polignac number, because 66013015406541 - 2¹ = 66013015406539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66013015406493 and 66013015406502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013015406561) 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, 582361 + ... + 11505006.

It is an arithmetic number, because the mean of its divisors is an integer number (3220655028864).

Almost surely, 2^{66013015406541} is an apocalyptic number.

It is an amenable number.

66013015406541 is a deficient number, since it is larger than the sum of its proper divisors (37047945517107).

66013015406541 is a wasteful number, since it uses less digits than its factorization.

66013015406541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12093761.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 66013015406541 in words is "sixty-six trillion, thirteen billion, fifteen million, four hundred six thousand, five hundred forty-one".