66271401 has 12 divisors (see below), whose sum is σ = 109400512. Its totient is φ = 37869336.

The previous prime is 66271393. The next prime is 66271481. The reversal of 66271401 is 10417266.

It is not a de Polignac number, because 66271401 - 2³ = 66271393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66271481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525901 + ... + 526026.

Almost surely, 2^66271401 is an apocalyptic number.

It is an amenable number.

66271401 is a deficient number, since it is larger than the sum of its proper divisors (43129111).

66271401 is a wasteful number, since it uses less digits than its factorization.

66271401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051940 (or 1051937 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 66271401 is about 8140.7248448771. The cubic root of 66271401 is about 404.6771821711.

Adding to 66271401 its reverse (10417266), we get a palindrome (76688667).

The spelling of 66271401 in words is "sixty-six million, two hundred seventy-one thousand, four hundred one".