166521952 has 24 divisors (see below), whose sum is σ = 328418496. Its totient is φ = 83114112.

The previous prime is 166521917. The next prime is 166521983. The reversal of 166521952 is 259125661.

166521952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15138 + ... + 23710.

It is an arithmetic number, because the mean of its divisors is an integer number (13684104).

Almost surely, 2^166521952 is an apocalyptic number.

It is an amenable number.

166521952 is a deficient number, since it is larger than the sum of its proper divisors (161896544).

166521952 is an equidigital number, since it uses as much as digits as its factorization.

166521952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190 (or 9182 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 166521952 is about 12904.3384952503. The cubic root of 166521952 is about 550.1618829264.

The spelling of 166521952 in words is "one hundred sixty-six million, five hundred twenty-one thousand, nine hundred fifty-two".