12207006657 has 6 divisors (see below), whose sum is σ = 17632342962. Its totient is φ = 8138004432.

The previous prime is 12207006619. The next prime is 12207006661. The reversal of 12207006657 is 75660070221.

It can be written as a sum of positive squares in only one way, i.e., 11919398976 + 287607681 = 109176^2 + 16959^2 .

It is not a de Polignac number, because 12207006657 - 2⁷ = 12207006529 is a prime.

It is a super-2 number, since 2×12207006657² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12207006607) 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, 678167028 + ... + 678167045.

It is an arithmetic number, because the mean of its divisors is an integer number (2938723827).

Almost surely, 2^12207006657 is an apocalyptic number.

It is an amenable number.

12207006657 is a deficient number, since it is larger than the sum of its proper divisors (5425336305).

12207006657 is a wasteful number, since it uses less digits than its factorization.

12207006657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356334079 (or 1356334076 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

Adding to 12207006657 its reverse (75660070221), we get a palindrome (87867076878).

The spelling of 12207006657 in words is "twelve billion, two hundred seven million, six thousand, six hundred fifty-seven".