166061228472 has 48 divisors (see below), whose sum is σ = 449828673840. Its totient is φ = 55343956608.

The previous prime is 166061228471. The next prime is 166061228539. The reversal of 166061228472 is 274822160661.

166061228472 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 612 + 28 + 4 + 7 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166061228471) 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, 212053 + ... + 614075.

It is an arithmetic number, because the mean of its divisors is an integer number (9371430705).

Almost surely, 2^166061228472 is an apocalyptic number.

166061228472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166061228472 is an abundant number, since it is smaller than the sum of its proper divisors (283767445368).

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

166061228472 is a wasteful number, since it uses less digits than its factorization.

166061228472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407772 (or 407765 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 166061228472 in words is "one hundred sixty-six billion, sixty-one million, two hundred twenty-eight thousand, four hundred seventy-two".