166461644 has 6 divisors (see below), whose sum is σ = 291307884. Its totient is φ = 83230820.

The previous prime is 166461629. The next prime is 166461667. The reversal of 166461644 is 446164661.

It is a junction number, because it is equal to n+sod(n) for n = 166461598 and 166461607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20807702 + ... + 20807709.

It is an arithmetic number, because the mean of its divisors is an integer number (48551314).

Almost surely, 2^166461644 is an apocalyptic number.

It is an amenable number.

166461644 is a deficient number, since it is larger than the sum of its proper divisors (124846240).

166461644 is a wasteful number, since it uses less digits than its factorization.

166461644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41615415 (or 41615413 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 166461644 is about 12902.0015501472. The cubic root of 166461644 is about 550.0954589131.

The spelling of 166461644 in words is "one hundred sixty-six million, four hundred sixty-one thousand, six hundred forty-four".