66100536 has 80 divisors (see below), whose sum is σ = 187525800. Its totient is φ = 21750336.

The previous prime is 66100519. The next prime is 66100571. The reversal of 66100536 is 63500166.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53170 + ... + 54398.

Almost surely, 2^66100536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66100536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93762900).

66100536 is an abundant number, since it is smaller than the sum of its proper divisors (121425264).

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

66100536 is a wasteful number, since it uses less digits than its factorization.

66100536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 66100536 is about 8130.2236131610. The cubic root of 66100536 is about 404.3290949836.

The spelling of 66100536 in words is "sixty-six million, one hundred thousand, five hundred thirty-six".