66435645454 has 16 divisors (see below), whose sum is σ = 103294789920. Its totient is φ = 32008604320.

The previous prime is 66435645443. The next prime is 66435645457. The reversal of 66435645454 is 45454653466.

It is a super-2 number, since 2×66435645454² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66435645457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109437 + ... + 1167784.

It is an arithmetic number, because the mean of its divisors is an integer number (6455924370).

Almost surely, 2^66435645454 is an apocalyptic number.

66435645454 is a deficient number, since it is larger than the sum of its proper divisors (36859144466).

66435645454 is a wasteful number, since it uses less digits than its factorization.

66435645454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277755.

The product of its digits is 20736000, while the sum is 52.

The spelling of 66435645454 in words is "sixty-six billion, four hundred thirty-five million, six hundred forty-five thousand, four hundred fifty-four".