66457813752619 has 2 divisors, whose sum is σ = 66457813752620. Its totient is φ = 66457813752618.

The previous prime is 66457813752569. The next prime is 66457813752637. The reversal of 66457813752619 is 91625731875466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66457813752619 - 2¹¹ = 66457813750571 is a prime.

It is a super-2 number, since 2×66457813752619² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66457813752689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33228906876309 + 33228906876310.

It is an arithmetic number, because the mean of its divisors is an integer number (33228906876310).

Almost surely, 2^{66457813752619} is an apocalyptic number.

66457813752619 is a deficient number, since it is larger than the sum of its proper divisors (1).

66457813752619 is an equidigital number, since it uses as much as digits as its factorization.

66457813752619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 457228800, while the sum is 70.

The spelling of 66457813752619 in words is "sixty-six trillion, four hundred fifty-seven billion, eight hundred thirteen million, seven hundred fifty-two thousand, six hundred nineteen".