66841019 has 8 divisors (see below), whose sum is σ = 76520448. Its totient is φ = 57194280.

The previous prime is 66841007. The next prime is 66841037. The reversal of 66841019 is 91014866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66841019 is a prime.

It is a super-2 number, since 2×66841019² = 8935443641916722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66841019.

It is not an unprimeable number, because it can be changed into a prime (66841079) 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, 3617 + ... + 12114.

It is an arithmetic number, because the mean of its divisors is an integer number (9565056).

Almost surely, 2^66841019 is an apocalyptic number.

66841019 is a deficient number, since it is larger than the sum of its proper divisors (9679429).

66841019 is a wasteful number, since it uses less digits than its factorization.

66841019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16345.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 66841019 is about 8175.6356939384. The cubic root of 66841019 is about 405.8333073697.

The spelling of 66841019 in words is "sixty-six million, eight hundred forty-one thousand, nineteen".