66441066 has 64 divisors (see below), whose sum is σ = 148635648. Its totient is φ = 19692288.

The previous prime is 66441061. The next prime is 66441071. The reversal of 66441066 is 66014466.

It is an interprime number because it is at equal distance from previous prime (66441061) and next prime (66441071).

It is not an unprimeable number, because it can be changed into a prime (66441061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297831 + ... + 298053.

It is an arithmetic number, because the mean of its divisors is an integer number (2322432).

Almost surely, 2^66441066 is an apocalyptic number.

66441066 is an abundant number, since it is smaller than the sum of its proper divisors (82194582).

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

66441066 is a wasteful number, since it uses less digits than its factorization.

66441066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66441066 is about 8151.1389388232. The cubic root of 66441066 is about 405.0222331949.

The spelling of 66441066 in words is "sixty-six million, four hundred forty-one thousand, sixty-six".