308644066 has 4 divisors (see below), whose sum is σ = 462966102. Its totient is φ = 154322032.

The previous prime is 308644033. The next prime is 308644081. The reversal of 308644066 is 660446803.

308644066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660446803 = 457 ⋅1445179.

It can be written as a sum of positive squares in only one way, i.e., 272943441 + 35700625 = 16521^2 + 5975^2 .

It is a super-2 number, since 2×308644066² = 190522318954024712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77161015 + ... + 77161018.

Almost surely, 2^308644066 is an apocalyptic number.

308644066 is a deficient number, since it is larger than the sum of its proper divisors (154322036).

308644066 is a wasteful number, since it uses less digits than its factorization.

308644066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154322035.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 308644066 is about 17568.2687251761. The cubic root of 308644066 is about 675.8017476478.

The spelling of 308644066 in words is "three hundred eight million, six hundred forty-four thousand, sixty-six".