2166747403537 has 2 divisors, whose sum is σ = 2166747403538. Its totient is φ = 2166747403536.

The previous prime is 2166747403477. The next prime is 2166747403553. The reversal of 2166747403537 is 7353047476612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221310106641 + 945437296896 = 1105129^2 + 972336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166747403537 - 2¹⁹ = 2166746879249 is a prime.

It is a super-2 number, since 2×2166747403537² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2166747403637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083373701768 + 1083373701769.

It is an arithmetic number, because the mean of its divisors is an integer number (1083373701769).

Almost surely, 2^{2166747403537} is an apocalyptic number.

It is an amenable number.

2166747403537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166747403537 is an equidigital number, since it uses as much as digits as its factorization.

2166747403537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 2166747403537 in words is "two trillion, one hundred sixty-six billion, seven hundred forty-seven million, four hundred three thousand, five hundred thirty-seven".