166772441 has 4 divisors (see below), whose sum is σ = 181933584. Its totient is φ = 151611300.

The previous prime is 166772413. The next prime is 166772449. The reversal of 166772441 is 144277661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166772441 - 2²² = 162578137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166772395 and 166772404.

It is not an unprimeable number, because it can be changed into a prime (166772449) 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 3 ways as a sum of consecutive naturals, for example, 7580555 + ... + 7580576.

It is an arithmetic number, because the mean of its divisors is an integer number (45483396).

Almost surely, 2^166772441 is an apocalyptic number.

166772441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166772441 is a deficient number, since it is larger than the sum of its proper divisors (15161143).

166772441 is a wasteful number, since it uses less digits than its factorization.

166772441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15161142.

The product of its digits is 56448, while the sum is 38.

The square root of 166772441 is about 12914.0404599025. The cubic root of 166772441 is about 550.4376032472.

The spelling of 166772441 in words is "one hundred sixty-six million, seven hundred seventy-two thousand, four hundred forty-one".