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66672899 is a prime number
BaseRepresentation
bin1111111001010…
…1100100000011
311122110100000122
43332111210003
5114032013044
610341010455
71436465426
oct376254403
9148410018
1066672899
11346a9377
121a3b3a2b
1310a75327
148bd79bd
155cbedee
hex3f95903

66672899 has 2 divisors, whose sum is σ = 66672900. Its totient is φ = 66672898.

The previous prime is 66672889. The next prime is 66672923. The reversal of 66672899 is 99827666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66672899 - 212 = 66668803 is a prime.

It is a super-2 number, since 2×666728992 = 8890550922128402, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66672899.

It is not a weakly prime, because it can be changed into another prime (66672889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336449 + 33336450.

It is an arithmetic number, because the mean of its divisors is an integer number (33336450).

Almost surely, 266672899 is an apocalyptic number.

66672899 is a deficient number, since it is larger than the sum of its proper divisors (1).

66672899 is an equidigital number, since it uses as much as digits as its factorization.

66672899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 66672899 is about 8165.3474512724. The cubic root of 66672899 is about 405.4927680813.

The spelling of 66672899 in words is "sixty-six million, six hundred seventy-two thousand, eight hundred ninety-nine".