66707001 has 6 divisors (see below), whose sum is σ = 96354570. Its totient is φ = 44471328.

The previous prime is 66706987. The next prime is 66707027. The reversal of 66707001 is 10070766.

It can be written as a sum of positive squares in only one way, i.e., 65853225 + 853776 = 8115^2 + 924^2 .

It is not a de Polignac number, because 66707001 - 2¹³ = 66698809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66707101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3705936 + ... + 3705953.

It is an arithmetic number, because the mean of its divisors is an integer number (16059095).

Almost surely, 2^66707001 is an apocalyptic number.

It is an amenable number.

66707001 is a deficient number, since it is larger than the sum of its proper divisors (29647569).

66707001 is a wasteful number, since it uses less digits than its factorization.

66707001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7411895 (or 7411892 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 66707001 is about 8167.4353991936. The cubic root of 66707001 is about 405.5618904065.

Adding to 66707001 its reverse (10070766), we get a palindrome (76777767).

The spelling of 66707001 in words is "sixty-six million, seven hundred seven thousand, one".