66816074 has 16 divisors (see below), whose sum is σ = 108071712. Its totient is φ = 30798768.

The previous prime is 66816037. The next prime is 66816077. The reversal of 66816074 is 47061866.

It is not an unprimeable number, because it can be changed into a prime (66816077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32357 + ... + 34359.

It is an arithmetic number, because the mean of its divisors is an integer number (6754482).

Almost surely, 2^66816074 is an apocalyptic number.

66816074 is a deficient number, since it is larger than the sum of its proper divisors (41255638).

66816074 is a wasteful number, since it uses less digits than its factorization.

66816074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 66816074 is about 8174.1099821326. The cubic root of 66816074 is about 405.7828155628.

The spelling of 66816074 in words is "sixty-six million, eight hundred sixteen thousand, seventy-four".