133706777551 has 2 divisors, whose sum is σ = 133706777552. Its totient is φ = 133706777550.

The previous prime is 133706777509. The next prime is 133706777591. The reversal of 133706777551 is 155777607331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133706777551 - 2¹³ = 133706769359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133706777591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66853388775 + 66853388776.

It is an arithmetic number, because the mean of its divisors is an integer number (66853388776).

Almost surely, 2^133706777551 is an apocalyptic number.

133706777551 is a deficient number, since it is larger than the sum of its proper divisors (1).

133706777551 is an equidigital number, since it uses as much as digits as its factorization.

133706777551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3241350, while the sum is 52.

The spelling of 133706777551 in words is "one hundred thirty-three billion, seven hundred six million, seven hundred seventy-seven thousand, five hundred fifty-one".