37782166073 has 2 divisors, whose sum is σ = 37782166074. Its totient is φ = 37782166072.

The previous prime is 37782166061. The next prime is 37782166129. The reversal of 37782166073 is 37066128773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32925191209 + 4856974864 = 181453^2 + 69692^2 .

It is a cyclic number.

It is not a de Polignac number, because 37782166073 - 2⁴ = 37782166057 is a prime.

It is not a weakly prime, because it can be changed into another prime (37782166003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18891083036 + 18891083037.

It is an arithmetic number, because the mean of its divisors is an integer number (18891083037).

Almost surely, 2^37782166073 is an apocalyptic number.

It is an amenable number.

37782166073 is a deficient number, since it is larger than the sum of its proper divisors (1).

37782166073 is an equidigital number, since it uses as much as digits as its factorization.

37782166073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The spelling of 37782166073 in words is "thirty-seven billion, seven hundred eighty-two million, one hundred sixty-six thousand, seventy-three".