669271157 has 2 divisors, whose sum is σ = 669271158. Its totient is φ = 669271156.

The previous prime is 669271153. The next prime is 669271201. The reversal of 669271157 is 751172966.

669271157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (669271201) can be obtained adding 669271157 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339812356 + 329458801 = 18434^2 + 18151^2 .

It is a cyclic number.

It is not a de Polignac number, because 669271157 - 2² = 669271153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669271151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334635578 + 334635579.

It is an arithmetic number, because the mean of its divisors is an integer number (334635579).

Almost surely, 2^669271157 is an apocalyptic number.

It is an amenable number.

669271157 is a deficient number, since it is larger than the sum of its proper divisors (1).

669271157 is an equidigital number, since it uses as much as digits as its factorization.

669271157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 44.

The square root of 669271157 is about 25870.2755493636. The cubic root of 669271157 is about 874.7166024264.

The spelling of 669271157 in words is "six hundred sixty-nine million, two hundred seventy-one thousand, one hundred fifty-seven".