66523045837091 has 16 divisors (see below), whose sum is σ = 68282716479264. Its totient is φ = 64782197685504.

The previous prime is 66523045837063. The next prime is 66523045837093. The reversal of 66523045837091 is 19073854032566.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66523045837091 is a prime.

It is a super-2 number, since 2×66523045837091² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66523045837091.

It is not an unprimeable number, because it can be changed into a prime (66523045837093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50268200 + ... + 51574586.

It is an arithmetic number, because the mean of its divisors is an integer number (4267669779954).

It is a 1-persistent number, because it is pandigital, but 2⋅66523045837091 = 133046091674182 is not.

Almost surely, 2^{66523045837091} is an apocalyptic number.

66523045837091 is a deficient number, since it is larger than the sum of its proper divisors (1759670642173).

66523045837091 is a wasteful number, since it uses less digits than its factorization.

66523045837091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313590.

The product of its (nonzero) digits is 32659200, while the sum is 59.

The spelling of 66523045837091 in words is "sixty-six trillion, five hundred twenty-three billion, forty-five million, eight hundred thirty-seven thousand, ninety-one".