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997666633 is a prime number
BaseRepresentation
bin111011011101110…
…010111101001001
32120112021201100001
4323131302331021
54020400313013
6242555243001
733503012035
oct7335627511
92515251301
10997666633
1147217a787
1223a149461
1312b9010b2
14967011c5
155c8beddd
hex3b772f49

997666633 has 2 divisors, whose sum is σ = 997666634. Its totient is φ = 997666632.

The previous prime is 997666627. The next prime is 997666639. The reversal of 997666633 is 336666799.

It is a balanced prime because it is at equal distance from previous prime (997666627) and next prime (997666639).

It can be written as a sum of positive squares in only one way, i.e., 948147264 + 49519369 = 30792^2 + 7037^2 .

It is a cyclic number.

It is not a de Polignac number, because 997666633 - 29 = 997666121 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (997666639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498833316 + 498833317.

It is an arithmetic number, because the mean of its divisors is an integer number (498833317).

Almost surely, 2997666633 is an apocalyptic number.

It is an amenable number.

997666633 is a deficient number, since it is larger than the sum of its proper divisors (1).

997666633 is an equidigital number, since it uses as much as digits as its factorization.

997666633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 55.

The square root of 997666633 is about 31585.8612831754. The cubic root of 997666633 is about 999.2216052588.

The spelling of 997666633 in words is "nine hundred ninety-seven million, six hundred sixty-six thousand, six hundred thirty-three".