166521452 has 24 divisors (see below), whose sum is σ = 296335536. Its totient is φ = 81865728.

The previous prime is 166521437. The next prime is 166521457. The reversal of 166521452 is 254125661.

It is not an unprimeable number, because it can be changed into a prime (166521457) 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, 61928 + ... + 64560.

It is an arithmetic number, because the mean of its divisors is an integer number (12347314).

Almost surely, 2^166521452 is an apocalyptic number.

It is an amenable number.

166521452 is a deficient number, since it is larger than the sum of its proper divisors (129814084).

166521452 is a wasteful number, since it uses less digits than its factorization.

166521452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897 (or 2895 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 166521452 is about 12904.3191219064. The cubic root of 166521452 is about 550.1613322859.

The spelling of 166521452 in words is "one hundred sixty-six million, five hundred twenty-one thousand, four hundred fifty-two".