133666051 has 2 divisors, whose sum is σ = 133666052. Its totient is φ = 133666050.

The previous prime is 133666037. The next prime is 133666063. The reversal of 133666051 is 150666331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133666051 - 2²⁵ = 100111619 is a prime.

It is a super-2 number, since 2×133666051² = 35733226379869202, which contains 22 as substring.

It is equal to p_7574134 and since 133666051 and 7574134 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133666021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66833025 + 66833026.

It is an arithmetic number, because the mean of its divisors is an integer number (66833026).

Almost surely, 2^133666051 is an apocalyptic number.

133666051 is a deficient number, since it is larger than the sum of its proper divisors (1).

133666051 is an equidigital number, since it uses as much as digits as its factorization.

133666051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 133666051 is about 11561.4035047653. The cubic root of 133666051 is about 511.2975430985.

Subtracting from 133666051 its product of nonzero digits (9720), we obtain a palindrome (133656331).

The spelling of 133666051 in words is "one hundred thirty-three million, six hundred sixty-six thousand, fifty-one".