669854903629 has 2 divisors, whose sum is σ = 669854903630. Its totient is φ = 669854903628.

The previous prime is 669854903603. The next prime is 669854903633. The reversal of 669854903629 is 926309458966.

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., 473075718025 + 196779185604 = 687805^2 + 443598^2 .

It is a cyclic number.

It is not a de Polignac number, because 669854903629 - 2²¹ = 669852806477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669854900629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334927451814 + 334927451815.

It is an arithmetic number, because the mean of its divisors is an integer number (334927451815).

Almost surely, 2^669854903629 is an apocalyptic number.

It is an amenable number.

669854903629 is a deficient number, since it is larger than the sum of its proper divisors (1).

669854903629 is an equidigital number, since it uses as much as digits as its factorization.

669854903629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151165440, while the sum is 67.

The spelling of 669854903629 in words is "six hundred sixty-nine billion, eight hundred fifty-four million, nine hundred three thousand, six hundred twenty-nine".