1466631643537 has 2 divisors, whose sum is σ = 1466631643538. Its totient is φ = 1466631643536.

The previous prime is 1466631643507. The next prime is 1466631643567. The reversal of 1466631643537 is 7353461366641.

It is a balanced prime because it is at equal distance from previous prime (1466631643507) and next prime (1466631643567).

It can be written as a sum of positive squares in only one way, i.e., 792391946896 + 674239696641 = 890164^2 + 821121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1466631643537 - 2¹⁹ = 1466631119249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1466631643507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 733315821768 + 733315821769.

It is an arithmetic number, because the mean of its divisors is an integer number (733315821769).

Almost surely, 2^{1466631643537} is an apocalyptic number.

It is an amenable number.

1466631643537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1466631643537 is an equidigital number, since it uses as much as digits as its factorization.

1466631643537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 55.

The spelling of 1466631643537 in words is "one trillion, four hundred sixty-six billion, six hundred thirty-one million, six hundred forty-three thousand, five hundred thirty-seven".