66954087240 has 64 divisors (see below), whose sum is σ = 212677695360. Its totient is φ = 16804162560.

The previous prime is 66954087163. The next prime is 66954087247. The reversal of 66954087240 is 4278045966.

66954087240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×66954087240³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (66954087247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16408276 + ... + 16412355.

It is an arithmetic number, because the mean of its divisors is an integer number (3323088990).

Almost surely, 2^66954087240 is an apocalyptic number.

66954087240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66954087240 is an abundant number, since it is smaller than the sum of its proper divisors (145723608120).

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

66954087240 is a wasteful number, since it uses less digits than its factorization.

66954087240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32820662 (or 32820658 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 66954087240 in words is "sixty-six billion, nine hundred fifty-four million, eighty-seven thousand, two hundred forty".