162166572 has 18 divisors (see below), whose sum is σ = 409921148. Its totient is φ = 54055512.

The previous prime is 162166561. The next prime is 162166573. The reversal of 162166572 is 275661261.

It is a happy number.

162166572 is a `hidden beast` number, since 1 + 6 + 21 + 66 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4504627 = 162166572 / (1 + 6 + 2 + 1 + 6 + 6 + 5 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (162166573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2252278 + ... + 2252349.

Almost surely, 2^162166572 is an apocalyptic number.

162166572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

162166572 is an abundant number, since it is smaller than the sum of its proper divisors (247754576).

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

162166572 is a wasteful number, since it uses less digits than its factorization.

162166572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504637 (or 4504632 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 162166572 is about 12734.4639463151. The cubic root of 162166572 is about 545.3229542258.

The spelling of 162166572 in words is "one hundred sixty-two million, one hundred sixty-six thousand, five hundred seventy-two".