66434586240 has 128 divisors (see below), whose sum is σ = 231011248320. Its totient is φ = 16105349120.

The previous prime is 66434586221. The next prime is 66434586259. The reversal of 66434586240 is 4268543466.

It is an interprime number because it is at equal distance from previous prime (66434586221) and next prime (66434586259).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 66434586240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551669 + ... + 1593908.

Almost surely, 2^66434586240 is an apocalyptic number.

66434586240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66434586240 is an abundant number, since it is smaller than the sum of its proper divisors (164576662080).

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

66434586240 is a wasteful number, since it uses less digits than its factorization.

66434586240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145610 (or 3145598 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 66434586240 in words is "sixty-six billion, four hundred thirty-four million, five hundred eighty-six thousand, two hundred forty".