166649472 has 96 divisors (see below), whose sum is σ = 523186560. Its totient is φ = 50496000.

The previous prime is 166649471. The next prime is 166649477. The reversal of 166649472 is 274946661.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (166649471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6097 + ... + 19247.

It is an arithmetic number, because the mean of its divisors is an integer number (5449860).

Almost surely, 2^166649472 is an apocalyptic number.

166649472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166649472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261593280).

166649472 is an abundant number, since it is smaller than the sum of its proper divisors (356537088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166649472 is a wasteful number, since it uses less digits than its factorization.

166649472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13182 (or 13167 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 166649472 is about 12909.2785236046. The cubic root of 166649472 is about 550.3022823188.

The spelling of 166649472 in words is "one hundred sixty-six million, six hundred forty-nine thousand, four hundred seventy-two".