7566397 has 2 divisors, whose sum is σ = 7566398. Its totient is φ = 7566396.

The previous prime is 7566371. The next prime is 7566407. The reversal of 7566397 is 7936657.

7566397 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4084441 + 3481956 = 2021^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 7566397 - 2¹⁵ = 7533629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7566347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3783198 + 3783199.

It is an arithmetic number, because the mean of its divisors is an integer number (3783199).

Almost surely, 2^7566397 is an apocalyptic number.

It is an amenable number.

7566397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7566397 is an equidigital number, since it uses as much as digits as its factorization.

7566397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 43.

The square root of 7566397 is about 2750.7084541987. The cubic root of 7566397 is about 196.3193201774.

The spelling of 7566397 in words is "seven million, five hundred sixty-six thousand, three hundred ninety-seven".