166874537 has 4 divisors (see below), whose sum is σ = 166916436. Its totient is φ = 166832640.

The previous prime is 166874503. The next prime is 166874573. The reversal of 166874537 is 735478661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735478661 = 419 ⋅1755319.

It can be written as a sum of positive squares in 2 ways, for example, as 103449241 + 63425296 = 10171^2 + 7964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166874537 is a prime.

It is a super-2 number, since 2×166874537² = 55694222197928738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166874491 and 166874500.

It is not an unprimeable number, because it can be changed into a prime (166874137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14264 + ... + 23177.

It is an arithmetic number, because the mean of its divisors is an integer number (41729109).

Almost surely, 2^166874537 is an apocalyptic number.

It is an amenable number.

166874537 is a deficient number, since it is larger than the sum of its proper divisors (41899).

166874537 is an equidigital number, since it uses as much as digits as its factorization.

166874537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41898.

The product of its digits is 846720, while the sum is 47.

The square root of 166874537 is about 12917.9927620354. The cubic root of 166874537 is about 550.5499040032.

The spelling of 166874537 in words is "one hundred sixty-six million, eight hundred seventy-four thousand, five hundred thirty-seven".