66414063954 has 128 divisors (see below), whose sum is σ = 161229201408. Its totient is φ = 17828743680.

The previous prime is 66414063943. The next prime is 66414064001. The reversal of 66414063954 is 45936041466.

It is a super-2 number, since 2×66414063954² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 18544444 + ... + 18548024.

It is an arithmetic number, because the mean of its divisors is an integer number (1259603136).

Almost surely, 2^66414063954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66414063954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80614600704).

66414063954 is an abundant number, since it is smaller than the sum of its proper divisors (94815137454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66414063954 is a wasteful number, since it uses less digits than its factorization.

66414063954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 66414063954 in words is "sixty-six billion, four hundred fourteen million, sixty-three thousand, nine hundred fifty-four".