66841901 has 8 divisors (see below), whose sum is σ = 77147904. Its totient is φ = 56725200.

The previous prime is 66841861. The next prime is 66841913. The reversal of 66841901 is 10914866.

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

It is not a de Polignac number, because 66841901 - 2¹⁸ = 66579757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66841991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46565 + ... + 47978.

It is an arithmetic number, because the mean of its divisors is an integer number (9643488).

Almost surely, 2^66841901 is an apocalyptic number.

It is an amenable number.

66841901 is a deficient number, since it is larger than the sum of its proper divisors (10306003).

66841901 is a wasteful number, since it uses less digits than its factorization.

66841901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94651.

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

The square root of 66841901 is about 8175.6896345201. The cubic root of 66841901 is about 405.8350924183.

The spelling of 66841901 in words is "sixty-six million, eight hundred forty-one thousand, nine hundred one".