166537772 has 6 divisors (see below), whose sum is σ = 291441108. Its totient is φ = 83268884.

The previous prime is 166537771. The next prime is 166537781. The reversal of 166537772 is 277735661.

166537772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166537771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20817218 + ... + 20817225.

It is an arithmetic number, because the mean of its divisors is an integer number (48573518).

Almost surely, 2^166537772 is an apocalyptic number.

It is an amenable number.

166537772 is a deficient number, since it is larger than the sum of its proper divisors (124903336).

166537772 is a wasteful number, since it uses less digits than its factorization.

166537772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41634447 (or 41634445 counting only the distinct ones).

The product of its digits is 370440, while the sum is 44.

The square root of 166537772 is about 12904.9514528339. The cubic root of 166537772 is about 550.1793046242.

The spelling of 166537772 in words is "one hundred sixty-six million, five hundred thirty-seven thousand, seven hundred seventy-two".