166639150379 has 16 divisors (see below), whose sum is σ = 179822042400. Its totient is φ = 153508628736.

The previous prime is 166639150357. The next prime is 166639150393. The reversal of 166639150379 is 973051936661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166639150379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166639150079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16643927 + ... + 16653935.

It is an arithmetic number, because the mean of its divisors is an integer number (11238877650).

Almost surely, 2^166639150379 is an apocalyptic number.

166639150379 is a deficient number, since it is larger than the sum of its proper divisors (13182892021).

166639150379 is a wasteful number, since it uses less digits than its factorization.

166639150379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12494.

The product of its (nonzero) digits is 5511240, while the sum is 56.

The spelling of 166639150379 in words is "one hundred sixty-six billion, six hundred thirty-nine million, one hundred fifty thousand, three hundred seventy-nine".