66100136 has 8 divisors (see below), whose sum is σ = 123937770. Its totient is φ = 33050064.

The previous prime is 66100117. The next prime is 66100187. The reversal of 66100136 is 63100166.

It can be written as a sum of positive squares in only one way, i.e., 63520900 + 2579236 = 7970^2 + 1606^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4131251 + ... + 4131266.

Almost surely, 2^66100136 is an apocalyptic number.

It is an amenable number.

66100136 is a deficient number, since it is larger than the sum of its proper divisors (57837634).

66100136 is a wasteful number, since it uses less digits than its factorization.

66100136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8262523 (or 8262519 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 66100136 is about 8130.1990135543. The cubic root of 66100136 is about 404.3282793978.

The spelling of 66100136 in words is "sixty-six million, one hundred thousand, one hundred thirty-six".