66116570537 has 2 divisors, whose sum is σ = 66116570538. Its totient is φ = 66116570536.

The previous prime is 66116570503. The next prime is 66116570551. The reversal of 66116570537 is 73507561166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51846834601 + 14269735936 = 227699^2 + 119456^2 .

It is a cyclic number.

It is not a de Polignac number, because 66116570537 - 2¹⁶ = 66116505001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66116570491 and 66116570500.

It is not a weakly prime, because it can be changed into another prime (66116570567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33058285268 + 33058285269.

It is an arithmetic number, because the mean of its divisors is an integer number (33058285269).

Almost surely, 2^66116570537 is an apocalyptic number.

It is an amenable number.

66116570537 is a deficient number, since it is larger than the sum of its proper divisors (1).

66116570537 is an equidigital number, since it uses as much as digits as its factorization.

66116570537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 47.

The spelling of 66116570537 in words is "sixty-six billion, one hundred sixteen million, five hundred seventy thousand, five hundred thirty-seven".