838166066 has 4 divisors (see below), whose sum is σ = 1257249102. Its totient is φ = 419083032.

The previous prime is 838166053. The next prime is 838166083. The reversal of 838166066 is 660661838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660661838 = 2 ⋅330330919.

It can be written as a sum of positive squares in only one way, i.e., 836655625 + 1510441 = 28925^2 + 1229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209541515 + ... + 209541518.

Almost surely, 2^838166066 is an apocalyptic number.

838166066 is a deficient number, since it is larger than the sum of its proper divisors (419083036).

838166066 is a wasteful number, since it uses less digits than its factorization.

838166066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419083035.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 838166066 is about 28951.0978375605. The cubic root of 838166066 is about 942.8516338805.

It can be divided in two parts, 8381 and 66066, that added together give a palindrome (74447).

The spelling of 838166066 in words is "eight hundred thirty-eight million, one hundred sixty-six thousand, sixty-six".