66747201 has 4 divisors (see below), whose sum is σ = 88996272. Its totient is φ = 44498132.

The previous prime is 66747199. The next prime is 66747211. The reversal of 66747201 is 10274766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66747201 - 2¹ = 66747199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66747211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11124531 + ... + 11124536.

It is an arithmetic number, because the mean of its divisors is an integer number (22249068).

Almost surely, 2^66747201 is an apocalyptic number.

It is an amenable number.

66747201 is a deficient number, since it is larger than the sum of its proper divisors (22249071).

66747201 is a wasteful number, since it uses less digits than its factorization.

66747201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22249070.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 66747201 is about 8169.8960213702. The cubic root of 66747201 is about 405.6433426969.

The spelling of 66747201 in words is "sixty-six million, seven hundred forty-seven thousand, two hundred one".