667625126635535 has 32 divisors (see below), whose sum is σ = 849774786981120. Its totient is φ = 502114460889600.

The previous prime is 667625126635531. The next prime is 667625126635567. The reversal of 667625126635535 is 535536621526766.

It is a happy number.

It is not a de Polignac number, because 667625126635535 - 2² = 667625126635531 is a prime.

It is a super-2 number, since 2×667625126635535² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667625126635531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 511223159 + ... + 512527431.

It is an arithmetic number, because the mean of its divisors is an integer number (26555462093160).

Almost surely, 2^{667625126635535} is an apocalyptic number.

667625126635535 is a deficient number, since it is larger than the sum of its proper divisors (182149660345585).

667625126635535 is a wasteful number, since it uses less digits than its factorization.

667625126635535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345559.

The product of its digits is 1224720000, while the sum is 68.

The spelling of 667625126635535 in words is "six hundred sixty-seven trillion, six hundred twenty-five billion, one hundred twenty-six million, six hundred thirty-five thousand, five hundred thirty-five".