166356649 has 8 divisors (see below), whose sum is σ = 168342048. Its totient is φ = 164376960.

The previous prime is 166356629. The next prime is 166356653. The reversal of 166356649 is 946653661.

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

It is a cyclic number.

It is not a de Polignac number, because 166356649 - 2⁷ = 166356521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166356599 and 166356608.

It is not an unprimeable number, because it can be changed into a prime (166356629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90954 + ... + 92764.

It is an arithmetic number, because the mean of its divisors is an integer number (21042756).

Almost surely, 2^166356649 is an apocalyptic number.

It is an amenable number.

166356649 is a deficient number, since it is larger than the sum of its proper divisors (1985399).

166356649 is an equidigital number, since it uses as much as digits as its factorization.

166356649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855.

The product of its digits is 699840, while the sum is 46.

The square root of 166356649 is about 12897.9319660169. The cubic root of 166356649 is about 549.9797777689.

The spelling of 166356649 in words is "one hundred sixty-six million, three hundred fifty-six thousand, six hundred forty-nine".