66870074 has 16 divisors (see below), whose sum is σ = 103184928. Its totient is φ = 32483472.

The previous prime is 66870073. The next prime is 66870077. The reversal of 66870074 is 47007866.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66870073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14969 + ... + 18915.

It is an arithmetic number, because the mean of its divisors is an integer number (6449058).

Almost surely, 2^66870074 is an apocalyptic number.

66870074 is a deficient number, since it is larger than the sum of its proper divisors (36314854).

66870074 is a wasteful number, since it uses less digits than its factorization.

66870074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 66870074 is about 8177.4124269233. The cubic root of 66870074 is about 405.8921024967.

The spelling of 66870074 in words is "sixty-six million, eight hundred seventy thousand, seventy-four".