66073277663 has 2 divisors, whose sum is σ = 66073277664. Its totient is φ = 66073277662.

The previous prime is 66073277609. The next prime is 66073277671. The reversal of 66073277663 is 36677237066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66073277663 - 2¹⁴ = 66073261279 is a prime.

It is a super-2 number, since 2×66073277663² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66073277603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33036638831 + 33036638832.

It is an arithmetic number, because the mean of its divisors is an integer number (33036638832).

Almost surely, 2^66073277663 is an apocalyptic number.

66073277663 is a deficient number, since it is larger than the sum of its proper divisors (1).

66073277663 is an equidigital number, since it uses as much as digits as its factorization.

66073277663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 53.

The spelling of 66073277663 in words is "sixty-six billion, seventy-three million, two hundred seventy-seven thousand, six hundred sixty-three".