66840316 has 6 divisors (see below), whose sum is σ = 116970560. Its totient is φ = 33420156.

The previous prime is 66840307. The next prime is 66840329. The reversal of 66840316 is 61304866.

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, 8355036 + ... + 8355043.

Almost surely, 2^66840316 is an apocalyptic number.

It is an amenable number.

66840316 is a deficient number, since it is larger than the sum of its proper divisors (50130244).

66840316 is a wasteful number, since it uses less digits than its factorization.

66840316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16710083 (or 16710081 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 66840316 is about 8175.5927002267. The cubic root of 66840316 is about 405.8318845816.

The spelling of 66840316 in words is "sixty-six million, eight hundred forty thousand, three hundred sixteen".