166626538 has 8 divisors (see below), whose sum is σ = 269165988. Its totient is φ = 76904544.

The previous prime is 166626527. The next prime is 166626539. The reversal of 166626538 is 835626661.

It can be written as a sum of positive squares in 2 ways, for example, as 166487409 + 139129 = 12903^2 + 373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 166626494 and 166626503.

It is not an unprimeable number, because it can be changed into a prime (166626539) 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, 3204331 + ... + 3204382.

Almost surely, 2^166626538 is an apocalyptic number.

166626538 is a deficient number, since it is larger than the sum of its proper divisors (102539450).

166626538 is a wasteful number, since it uses less digits than its factorization.

166626538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6408728.

The product of its digits is 311040, while the sum is 43.

The square root of 166626538 is about 12908.3902172192. The cubic root of 166626538 is about 550.2770372912.

The spelling of 166626538 in words is "one hundred sixty-six million, six hundred twenty-six thousand, five hundred thirty-eight".