66741618 has 16 divisors (see below), whose sum is σ = 134503776. Its totient is φ = 22077120.

The previous prime is 66741613. The next prime is 66741629. The reversal of 66741618 is 81614766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66741613) 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, 41671 + ... + 43242.

It is an arithmetic number, because the mean of its divisors is an integer number (8406486).

Almost surely, 2^66741618 is an apocalyptic number.

66741618 is an abundant number, since it is smaller than the sum of its proper divisors (67762158).

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

66741618 is a wasteful number, since it uses less digits than its factorization.

66741618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85049.

The product of its digits is 48384, while the sum is 39.

The square root of 66741618 is about 8169.5543330098. The cubic root of 66741618 is about 405.6320325102.

The spelling of 66741618 in words is "sixty-six million, seven hundred forty-one thousand, six hundred eighteen".