2660400097 has 2 divisors, whose sum is σ = 2660400098. Its totient is φ = 2660400096.

The previous prime is 2660400077. The next prime is 2660400107. The reversal of 2660400097 is 7900040662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2507605776 + 152794321 = 50076^2 + 12361^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660400097 - 2¹¹ = 2660398049 is a prime.

It is a super-2 number, since 2×2660400097² = 14155457352235218818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2660400077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330200048 + 1330200049.

It is an arithmetic number, because the mean of its divisors is an integer number (1330200049).

Almost surely, 2^2660400097 is an apocalyptic number.

It is an amenable number.

2660400097 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660400097 is an equidigital number, since it uses as much as digits as its factorization.

2660400097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2660400097 is about 51579.0664611139. The cubic root of 2660400097 is about 1385.6354475242.

The spelling of 2660400097 in words is "two billion, six hundred sixty million, four hundred thousand, ninety-seven".