66999165360 has 40 divisors (see below), whose sum is σ = 207697413360. Its totient is φ = 17866444032.

The previous prime is 66999165329. The next prime is 66999165367. The reversal of 66999165360 is 6356199966.

66999165360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 66999165294 and 66999165303.

It is not an unprimeable number, because it can be changed into a prime (66999165367) 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, 139581355 + ... + 139581834.

It is an arithmetic number, because the mean of its divisors is an integer number (5192435334).

Almost surely, 2^66999165360 is an apocalyptic number.

66999165360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66999165360 is an abundant number, since it is smaller than the sum of its proper divisors (140698248000).

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

66999165360 is a wasteful number, since it uses less digits than its factorization.

66999165360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279163205 (or 279163199 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 60.

The spelling of 66999165360 in words is "sixty-six billion, nine hundred ninety-nine million, one hundred sixty-five thousand, three hundred sixty".