66841355 has 16 divisors (see below), whose sum is σ = 92927424. Its totient is φ = 45204480.

The previous prime is 66841349. The next prime is 66841361. The reversal of 66841355 is 55314866.

It is an interprime number because it is at equal distance from previous prime (66841349) and next prime (66841361).

It is not a de Polignac number, because 66841355 - 2⁴ = 66841339 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10526 + ... + 15635.

It is an arithmetic number, because the mean of its divisors is an integer number (5807964).

Almost surely, 2^66841355 is an apocalyptic number.

66841355 is a deficient number, since it is larger than the sum of its proper divisors (26086069).

66841355 is a wasteful number, since it uses less digits than its factorization.

66841355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26246.

The product of its digits is 86400, while the sum is 38.

The square root of 66841355 is about 8175.6562427734. The cubic root of 66841355 is about 405.8339873900.

The spelling of 66841355 in words is "sixty-six million, eight hundred forty-one thousand, three hundred fifty-five".