66126661622 has 32 divisors (see below), whose sum is σ = 115768906560. Its totient is φ = 27744076800.

The previous prime is 66126661621. The next prime is 66126661669. The reversal of 66126661622 is 22616662166.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66126661621) 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 15 ways as a sum of consecutive naturals, for example, 136883 + ... + 388574.

It is an arithmetic number, because the mean of its divisors is an integer number (3617778330).

Almost surely, 2^66126661622 is an apocalyptic number.

66126661622 is a deficient number, since it is larger than the sum of its proper divisors (49642244938).

66126661622 is a wasteful number, since it uses less digits than its factorization.

66126661622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525656.

The product of its digits is 373248, while the sum is 44.

The spelling of 66126661622 in words is "sixty-six billion, one hundred twenty-six million, six hundred sixty-one thousand, six hundred twenty-two".