166233740638 has 8 divisors (see below), whose sum is σ = 284972126832. Its totient is φ = 71243031696.

The previous prime is 166233740611. The next prime is 166233740741. The reversal of 166233740638 is 836047332661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 166233740591 and 166233740600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5936919295 + ... + 5936919322.

It is an arithmetic number, because the mean of its divisors is an integer number (35621515854).

Almost surely, 2^166233740638 is an apocalyptic number.

166233740638 is a deficient number, since it is larger than the sum of its proper divisors (118738386194).

166233740638 is a wasteful number, since it uses less digits than its factorization.

166233740638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11873838626.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 166233740638 in words is "one hundred sixty-six billion, two hundred thirty-three million, seven hundred forty thousand, six hundred thirty-eight".