66067746 has 16 divisors (see below), whose sum is σ = 139908384. Its totient is φ = 20727104.

The previous prime is 66067741. The next prime is 66067777. The reversal of 66067746 is 64776066.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66067698 and 66067707.

It is not an unprimeable number, because it can be changed into a prime (66067741) 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, 323760 + ... + 323963.

It is an arithmetic number, because the mean of its divisors is an integer number (8744274).

Almost surely, 2^66067746 is an apocalyptic number.

66067746 is an abundant number, since it is smaller than the sum of its proper divisors (73840638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66067746 is a wasteful number, since it uses less digits than its factorization.

66067746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647745.

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 66067746 is about 8128.2068133137. The cubic root of 66067746 is about 404.2622264189.

The spelling of 66067746 in words is "sixty-six million, sixty-seven thousand, seven hundred forty-six".