10156666649 has 2 divisors, whose sum is σ = 10156666650. Its totient is φ = 10156666648.

The previous prime is 10156666589. The next prime is 10156666651. The reversal of 10156666649 is 94666665101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6141543424 + 4015123225 = 78368^2 + 63365^2 .

It is a cyclic number.

It is not a de Polignac number, because 10156666649 - 2¹⁶ = 10156601113 is a prime.

Together with 10156666651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10156666597 and 10156666606.

It is not a weakly prime, because it can be changed into another prime (10156666699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078333324 + 5078333325.

It is an arithmetic number, because the mean of its divisors is an integer number (5078333325).

Almost surely, 2^10156666649 is an apocalyptic number.

It is an amenable number.

10156666649 is a deficient number, since it is larger than the sum of its proper divisors (1).

10156666649 is an equidigital number, since it uses as much as digits as its factorization.

10156666649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 10156666649 in words is "ten billion, one hundred fifty-six million, six hundred sixty-six thousand, six hundred forty-nine".