66901427 has 4 divisors (see below), whose sum is σ = 66935400. Its totient is φ = 66867456.

The previous prime is 66901391. The next prime is 66901481. The reversal of 66901427 is 72410966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66901427 - 2⁶ = 66901363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66921427) 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, 13838 + ... + 18035.

It is an arithmetic number, because the mean of its divisors is an integer number (16733850).

Almost surely, 2^66901427 is an apocalyptic number.

66901427 is a deficient number, since it is larger than the sum of its proper divisors (33973).

66901427 is a wasteful number, since it uses less digits than its factorization.

66901427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33972.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 66901427 is about 8179.3292512284. The cubic root of 66901427 is about 405.9555287099.

The spelling of 66901427 in words is "sixty-six million, nine hundred one thousand, four hundred twenty-seven".