66447101 has 16 divisors (see below), whose sum is σ = 82373760. Its totient is φ = 52293120.

The previous prime is 66447041. The next prime is 66447103. The reversal of 66447101 is 10174466.

It is a cyclic number.

It is not a de Polignac number, because 66447101 - 2¹⁰ = 66446077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66447103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1931 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (5148360).

Almost surely, 2^66447101 is an apocalyptic number.

It is an amenable number.

66447101 is a deficient number, since it is larger than the sum of its proper divisors (15926659).

66447101 is a wasteful number, since it uses less digits than its factorization.

66447101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13684.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 66447101 is about 8151.5091240825. The cubic root of 66447101 is about 405.0344958678.

The spelling of 66447101 in words is "sixty-six million, four hundred forty-seven thousand, one hundred one".