66400030967 has 2 divisors, whose sum is σ = 66400030968. Its totient is φ = 66400030966.

The previous prime is 66400030951. The next prime is 66400030979. The reversal of 66400030967 is 76903000466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66400030967 - 2⁴ = 66400030951 is a prime.

It is a super-2 number, since 2×66400030967² (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 (66400032967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33200015483 + 33200015484.

It is an arithmetic number, because the mean of its divisors is an integer number (33200015484).

Almost surely, 2^66400030967 is an apocalyptic number.

66400030967 is a deficient number, since it is larger than the sum of its proper divisors (1).

66400030967 is an equidigital number, since it uses as much as digits as its factorization.

66400030967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 66400030967 in words is "sixty-six billion, four hundred million, thirty thousand, nine hundred sixty-seven".