66553201 has 8 divisors (see below), whose sum is σ = 78188544. Its totient is φ = 55848720.

The previous prime is 66553189. The next prime is 66553217. The reversal of 66553201 is 10235566.

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 66553201 - 2⁷ = 66553073 is a prime.

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 66553201.

It is not an unprimeable number, because it can be changed into a prime (66553801) 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, 232561 + ... + 232846.

It is an arithmetic number, because the mean of its divisors is an integer number (9773568).

Almost surely, 2^66553201 is an apocalyptic number.

It is an amenable number.

66553201 is a deficient number, since it is larger than the sum of its proper divisors (11635343).

66553201 is a wasteful number, since it uses less digits than its factorization.

66553201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465431.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 66553201 is about 8158.0145256061. The cubic root of 66553201 is about 405.2499620382.

Adding to 66553201 its reverse (10235566), we get a palindrome (76788767).

The spelling of 66553201 in words is "sixty-six million, five hundred fifty-three thousand, two hundred one".