66800088 has 24 divisors (see below), whose sum is σ = 180917100. Its totient is φ = 22266672.

The previous prime is 66800081. The next prime is 66800093. The reversal of 66800088 is 88000866.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66800081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 463818 + ... + 463961.

Almost surely, 2^66800088 is an apocalyptic number.

It is an amenable number.

66800088 is an abundant number, since it is smaller than the sum of its proper divisors (114117012).

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

66800088 is a wasteful number, since it uses less digits than its factorization.

66800088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927791 (or 927784 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 66800088 is about 8173.1320801759. The cubic root of 66800088 is about 405.7504512872.

The spelling of 66800088 in words is "sixty-six million, eight hundred thousand, eighty-eight".