166233740642 has 4 divisors (see below), whose sum is σ = 249350610966. Its totient is φ = 83116870320.

The previous prime is 166233740611. The next prime is 166233740741. The reversal of 166233740642 is 246047332661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 157616146081 + 8617594561 = 397009^2 + 92831^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166233740593 and 166233740602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41558435159 + ... + 41558435162.

Almost surely, 2^166233740642 is an apocalyptic number.

166233740642 is a deficient number, since it is larger than the sum of its proper divisors (83116870324).

166233740642 is an equidigital number, since it uses as much as digits as its factorization.

166233740642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83116870323.

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 166233740642 in words is "one hundred sixty-six billion, two hundred thirty-three million, seven hundred forty thousand, six hundred forty-two".