662813772449 has 2 divisors, whose sum is σ = 662813772450. Its totient is φ = 662813772448.

The previous prime is 662813772241. The next prime is 662813772469. The reversal of 662813772449 is 944277318266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490289842849 + 172523929600 = 700207^2 + 415360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662813772449 is a prime.

It is not a weakly prime, because it can be changed into another prime (662813772469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331406886224 + 331406886225.

It is an arithmetic number, because the mean of its divisors is an integer number (331406886225).

Almost surely, 2^662813772449 is an apocalyptic number.

It is an amenable number.

662813772449 is a deficient number, since it is larger than the sum of its proper divisors (1).

662813772449 is an equidigital number, since it uses as much as digits as its factorization.

662813772449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 59.

The spelling of 662813772449 in words is "six hundred sixty-two billion, eight hundred thirteen million, seven hundred seventy-two thousand, four hundred forty-nine".