66441416 has 8 divisors (see below), whose sum is σ = 124577670. Its totient is φ = 33220704.

The previous prime is 66441413. The next prime is 66441469. The reversal of 66441416 is 61414466.

It can be written as a sum of positive squares in only one way, i.e., 66357316 + 84100 = 8146^2 + 290^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66441413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4152581 + ... + 4152596.

Almost surely, 2^66441416 is an apocalyptic number.

It is an amenable number.

66441416 is a deficient number, since it is larger than the sum of its proper divisors (58136254).

66441416 is a wasteful number, since it uses less digits than its factorization.

66441416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8305183 (or 8305179 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 66441416 is about 8151.1604081873. The cubic root of 66441416 is about 405.0229443893.

The spelling of 66441416 in words is "sixty-six million, four hundred forty-one thousand, four hundred sixteen".