66414434297 has 2 divisors, whose sum is σ = 66414434298. Its totient is φ = 66414434296.

The previous prime is 66414434269. The next prime is 66414434329. The reversal of 66414434297 is 79243441466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63330742336 + 3083691961 = 251656^2 + 55531^2 .

It is a cyclic number.

It is not a de Polignac number, because 66414434297 - 2²² = 66410239993 is a prime.

It is not a weakly prime, because it can be changed into another prime (66414433297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207217148 + 33207217149.

It is an arithmetic number, because the mean of its divisors is an integer number (33207217149).

Almost surely, 2^66414434297 is an apocalyptic number.

It is an amenable number.

66414434297 is a deficient number, since it is larger than the sum of its proper divisors (1).

66414434297 is an equidigital number, since it uses as much as digits as its factorization.

66414434297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 50.

The spelling of 66414434297 in words is "sixty-six billion, four hundred fourteen million, four hundred thirty-four thousand, two hundred ninety-seven".