66063970560 has 144 divisors (see below), whose sum is σ = 241133590656. Its totient is φ = 15100329984.

The previous prime is 66063970549. The next prime is 66063970561. The reversal of 66063970560 is 6507936066.

It is a super-3 number, since 3×66063970560³ (a number of 33 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (66063970561) 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, 1201989 + ... + 1255748.

It is an arithmetic number, because the mean of its divisors is an integer number (1674538824).

Almost surely, 2^66063970560 is an apocalyptic number.

66063970560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66063970560 is an abundant number, since it is smaller than the sum of its proper divisors (175069620096).

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

66063970560 is a wasteful number, since it uses less digits than its factorization.

66063970560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457768 (or 2457754 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 48.

The spelling of 66063970560 in words is "sixty-six billion, sixty-three million, nine hundred seventy thousand, five hundred sixty".