164966638 has 4 divisors (see below), whose sum is σ = 247449960. Its totient is φ = 82483318.

The previous prime is 164966617. The next prime is 164966647. The reversal of 164966638 is 836669461.

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

It is a junction number, because it is equal to n+sod(n) for n = 164966591 and 164966600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41241658 + ... + 41241661.

It is an arithmetic number, because the mean of its divisors is an integer number (61862490).

Almost surely, 2^164966638 is an apocalyptic number.

164966638 is a deficient number, since it is larger than the sum of its proper divisors (82483322).

164966638 is an equidigital number, since it uses as much as digits as its factorization.

164966638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82483321.

The product of its digits is 1119744, while the sum is 49.

The square root of 164966638 is about 12843.9338989268. The cubic root of 164966638 is about 548.4436862634.

The spelling of 164966638 in words is "one hundred sixty-four million, nine hundred sixty-six thousand, six hundred thirty-eight".