66841601 has 8 divisors (see below), whose sum is σ = 71352000. Its totient is φ = 62430480.

The previous prime is 66841597. The next prime is 66841613. The reversal of 66841601 is 10614866.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66841601 - 2² = 66841597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66841681) 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, 23426 + ... + 26123.

It is an arithmetic number, because the mean of its divisors is an integer number (8919000).

Almost surely, 2^66841601 is an apocalyptic number.

It is an amenable number.

66841601 is a deficient number, since it is larger than the sum of its proper divisors (4510399).

66841601 is a wasteful number, since it uses less digits than its factorization.

66841601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49639.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 66841601 is about 8175.6712874234. The cubic root of 66841601 is about 405.8344852606.

The spelling of 66841601 in words is "sixty-six million, eight hundred forty-one thousand, six hundred one".