806656157 has 2 divisors, whose sum is σ = 806656158. Its totient is φ = 806656156.

The previous prime is 806656117. The next prime is 806656183. The reversal of 806656157 is 751656608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806219236 + 436921 = 28394^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 806656157 - 2⁶ = 806656093 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 (806656117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403328078 + 403328079.

It is an arithmetic number, because the mean of its divisors is an integer number (403328079).

Almost surely, 2^806656157 is an apocalyptic number.

It is an amenable number.

806656157 is a deficient number, since it is larger than the sum of its proper divisors (1).

806656157 is an equidigital number, since it uses as much as digits as its factorization.

806656157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 806656157 is about 28401.6928544761. The cubic root of 806656157 is about 930.8852545001.

The spelling of 806656157 in words is "eight hundred six million, six hundred fifty-six thousand, one hundred fifty-seven".