66206704 has 40 divisors (see below), whose sum is σ = 136384128. Its totient is φ = 31027200.

The previous prime is 66206689. The next prime is 66206729. The reversal of 66206704 is 40760266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108769 + ... + 109375.

Almost surely, 2^66206704 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 66206704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68192064).

66206704 is an abundant number, since it is smaller than the sum of its proper divisors (70177424).

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

66206704 is a wasteful number, since it uses less digits than its factorization.

66206704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 66206704 is about 8136.7502112330. The cubic root of 66206704 is about 404.5454515217.

The spelling of 66206704 in words is "sixty-six million, two hundred six thousand, seven hundred four".