166626031 has 8 divisors (see below), whose sum is σ = 195756624. Its totient is φ = 139825920.

The previous prime is 166626013. The next prime is 166626037. The reversal of 166626031 is 130626661.

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

It is not a de Polignac number, because 166626031 - 2⁹ = 166625519 is a prime.

It is a super-2 number, since 2×166626031² = 55528468413625922, 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 = 166625984 and 166626002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166626037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582466 + ... + 582751.

It is an arithmetic number, because the mean of its divisors is an integer number (24469578).

Almost surely, 2^166626031 is an apocalyptic number.

166626031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166626031 is a deficient number, since it is larger than the sum of its proper divisors (29130593).

166626031 is a wasteful number, since it uses less digits than its factorization.

166626031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165241.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 166626031 is about 12908.3705788144. The cubic root of 166626031 is about 550.2764791754.

The spelling of 166626031 in words is "one hundred sixty-six million, six hundred twenty-six thousand, thirty-one".