63866741 has 2 divisors, whose sum is σ = 63866742. Its totient is φ = 63866740.

The previous prime is 63866723. The next prime is 63866743. The reversal of 63866741 is 14766836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63266116 + 600625 = 7954^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 63866741 - 2¹⁰ = 63865717 is a prime.

It is a super-2 number, since 2×63866741² = 8157921211922162, which contains 22 as substring.

Together with 63866743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63866743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31933370 + 31933371.

It is an arithmetic number, because the mean of its divisors is an integer number (31933371).

Almost surely, 2^63866741 is an apocalyptic number.

It is an amenable number.

63866741 is a deficient number, since it is larger than the sum of its proper divisors (1).

63866741 is an equidigital number, since it uses as much as digits as its factorization.

63866741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 63866741 is about 7991.6669725408. Note that the first 3 decimals coincide. The cubic root of 63866741 is about 399.7221841739.

The spelling of 63866741 in words is "sixty-three million, eight hundred sixty-six thousand, seven hundred forty-one".