670811801449 has 2 divisors, whose sum is σ = 670811801450. Its totient is φ = 670811801448.

The previous prime is 670811801371. The next prime is 670811801483. The reversal of 670811801449 is 944108118076.

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., 383829811600 + 286981989849 = 619540^2 + 535707^2 .

It is a cyclic number.

It is not a de Polignac number, because 670811801449 - 2¹⁹ = 670811277161 is a prime.

It is a super-3 number, since 3×670811801449³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (670811801489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335405900724 + 335405900725.

It is an arithmetic number, because the mean of its divisors is an integer number (335405900725).

Almost surely, 2^670811801449 is an apocalyptic number.

It is an amenable number.

670811801449 is a deficient number, since it is larger than the sum of its proper divisors (1).

670811801449 is an equidigital number, since it uses as much as digits as its factorization.

670811801449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 670811801449 in words is "six hundred seventy billion, eight hundred eleven million, eight hundred one thousand, four hundred forty-nine".