166216431436 has 72 divisors (see below), whose sum is σ = 331478602560. Its totient is φ = 72787249920.

The previous prime is 166216431421. The next prime is 166216431463. The reversal of 166216431436 is 634134612661.

It is a junction number, because it is equal to n+sod(n) for n = 166216431392 and 166216431401.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6485880 + ... + 6511456.

It is an arithmetic number, because the mean of its divisors is an integer number (4603869480).

Almost surely, 2^166216431436 is an apocalyptic number.

It is an amenable number.

166216431436 is a deficient number, since it is larger than the sum of its proper divisors (165262171124).

166216431436 is a wasteful number, since it uses less digits than its factorization.

166216431436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26095 (or 26082 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The spelling of 166216431436 in words is "one hundred sixty-six billion, two hundred sixteen million, four hundred thirty-one thousand, four hundred thirty-six".