6537766602397 has 2 divisors, whose sum is σ = 6537766602398. Its totient is φ = 6537766602396.

The previous prime is 6537766602347. The next prime is 6537766602407. The reversal of 6537766602397 is 7932066677356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4932956492676 + 1604810109721 = 2221026^2 + 1266811^2 .

It is a cyclic number.

It is not a de Polignac number, because 6537766602397 - 2²⁷ = 6537632384669 is a prime.

It is a super-2 number, since 2×6537766602397² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6537766602307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3268883301198 + 3268883301199.

It is an arithmetic number, because the mean of its divisors is an integer number (3268883301199).

Almost surely, 2^{6537766602397} is an apocalyptic number.

It is an amenable number.

6537766602397 is a deficient number, since it is larger than the sum of its proper divisors (1).

6537766602397 is an equidigital number, since it uses as much as digits as its factorization.

6537766602397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360067680, while the sum is 67.

The spelling of 6537766602397 in words is "six trillion, five hundred thirty-seven billion, seven hundred sixty-six million, six hundred two thousand, three hundred ninety-seven".