100145866 has 4 divisors (see below), whose sum is σ = 150218802. Its totient is φ = 50072932.

The previous prime is 100145849. The next prime is 100145873. The reversal of 100145866 is 668541001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668541001 = 7477 ⋅89413.

It can be written as a sum of positive squares in only one way, i.e., 88755241 + 11390625 = 9421^2 + 3375^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25036465 + ... + 25036468.

Almost surely, 2^100145866 is an apocalyptic number.

100145866 is a deficient number, since it is larger than the sum of its proper divisors (50072936).

100145866 is an equidigital number, since it uses as much as digits as its factorization.

100145866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50072935.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 100145866 is about 10007.2906423267. The cubic root of 100145866 is about 464.3844570506.

Adding to 100145866 its reverse (668541001), we get a palindrome (768686867).

The spelling of 100145866 in words is "one hundred million, one hundred forty-five thousand, eight hundred sixty-six".