166282591537 has 4 divisors (see below), whose sum is σ = 167996845156. Its totient is φ = 164568337920.

The previous prime is 166282591529. The next prime is 166282591583. The reversal of 166282591537 is 735195282661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99739745856 + 66542845681 = 315816^2 + 257959^2 .

It is a cyclic number.

It is not a de Polignac number, because 166282591537 - 2³ = 166282591529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166282592537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857126664 + ... + 857126857.

It is an arithmetic number, because the mean of its divisors is an integer number (41999211289).

Almost surely, 2^166282591537 is an apocalyptic number.

It is an amenable number.

166282591537 is a deficient number, since it is larger than the sum of its proper divisors (1714253619).

166282591537 is an equidigital number, since it uses as much as digits as its factorization.

166282591537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714253618.

The product of its digits is 5443200, while the sum is 55.

The spelling of 166282591537 in words is "one hundred sixty-six billion, two hundred eighty-two million, five hundred ninety-one thousand, five hundred thirty-seven".