166235452012 has 24 divisors (see below), whose sum is σ = 336679400960. Its totient is φ = 70341944400.

The previous prime is 166235451997. The next prime is 166235452013. The reversal of 166235452012 is 210254532661.

It is not an unprimeable number, because it can be changed into a prime (166235452013) 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, 37573614 + ... + 37578037.

Almost surely, 2^166235452012 is an apocalyptic number.

It is an amenable number.

166235452012 is an abundant number, since it is smaller than the sum of its proper divisors (170443948948).

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

166235452012 is a wasteful number, since it uses less digits than its factorization.

166235452012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75151741 (or 75151739 counting only the distinct ones).

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

Adding to 166235452012 its reverse (210254532661), we get a palindrome (376489984673).

The spelling of 166235452012 in words is "one hundred sixty-six billion, two hundred thirty-five million, four hundred fifty-two thousand, twelve".