166506454 has 16 divisors (see below), whose sum is σ = 254604240. Its totient is φ = 81646560.

The previous prime is 166506433. The next prime is 166506491. The reversal of 166506454 is 454605661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43677 + ... + 47335.

It is an arithmetic number, because the mean of its divisors is an integer number (15912765).

Almost surely, 2^166506454 is an apocalyptic number.

166506454 is a deficient number, since it is larger than the sum of its proper divisors (88097786).

166506454 is a wasteful number, since it uses less digits than its factorization.

166506454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 166506454 is about 12903.7379855606. The cubic root of 166506454 is about 550.1448147596.

It can be divided in two parts, 16650 and 6454, that added together give a square (23104 = 152²).

The spelling of 166506454 in words is "one hundred sixty-six million, five hundred six thousand, four hundred fifty-four".