66800107 has 12 divisors (see below), whose sum is σ = 74261880. Its totient is φ = 60035360.

The previous prime is 66800099. The next prime is 66800131. The reversal of 66800107 is 70100866.

It is not a de Polignac number, because 66800107 - 2³ = 66800099 is a prime.

It is a super-2 number, since 2×66800107² = 8924508590422898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66800177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7668 + ... + 13870.

It is an arithmetic number, because the mean of its divisors is an integer number (6188490).

Almost surely, 2^66800107 is an apocalyptic number.

66800107 is a deficient number, since it is larger than the sum of its proper divisors (7461773).

66800107 is a wasteful number, since it uses less digits than its factorization.

66800107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6314 (or 6303 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 66800107 is about 8173.1332425209. The cubic root of 66800107 is about 405.7504897565.

The spelling of 66800107 in words is "sixty-six million, eight hundred thousand, one hundred seven".