66078201 has 32 divisors (see below), whose sum is σ = 107163648. Its totient is φ = 35354880.

The previous prime is 66078197. The next prime is 66078203. The reversal of 66078201 is 10287066.

It is a happy number.

It is not a de Polignac number, because 66078201 - 2² = 66078197 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66078203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96406 + ... + 97088.

It is an arithmetic number, because the mean of its divisors is an integer number (3348864).

Almost surely, 2^66078201 is an apocalyptic number.

It is an amenable number.

66078201 is a deficient number, since it is larger than the sum of its proper divisors (41085447).

66078201 is a wasteful number, since it uses less digits than its factorization.

66078201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 66078201 is about 8128.8499186539. The cubic root of 66078201 is about 404.2835496763.

The spelling of 66078201 in words is "sixty-six million, seventy-eight thousand, two hundred one".