661526625166 has 32 divisors (see below), whose sum is σ = 1116476006400. Its totient is φ = 291382308000.

The previous prime is 661526625083. The next prime is 661526625167.

661526625166 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661526625167) 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 in 15 ways as a sum of consecutive naturals, for example, 3062766 + ... + 3271633.

It is an arithmetic number, because the mean of its divisors is an integer number (34889875200).

Almost surely, 2^661526625166 is an apocalyptic number.

661526625166 is a deficient number, since it is larger than the sum of its proper divisors (454949381234).

661526625166 is a wasteful number, since it uses less digits than its factorization.

661526625166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334560.

The product of its digits is 4665600, while the sum is 52.

The spelling of 661526625166 in words is "six hundred sixty-one billion, five hundred twenty-six million, six hundred twenty-five thousand, one hundred sixty-six".