66908796 has 24 divisors (see below), whose sum is σ = 156691920. Its totient is φ = 22221312.

The previous prime is 66908791. The next prime is 66908797. The reversal of 66908796 is 69780966.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66908791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6741 + ... + 13388.

It is an arithmetic number, because the mean of its divisors is an integer number (6528830).

Almost surely, 2^66908796 is an apocalyptic number.

It is an amenable number.

66908796 is an abundant number, since it is smaller than the sum of its proper divisors (89783124).

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

66908796 is a wasteful number, since it uses less digits than its factorization.

66908796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20413 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 66908796 is about 8179.7797036351. The cubic root of 66908796 is about 405.9704331078.

The spelling of 66908796 in words is "sixty-six million, nine hundred eight thousand, seven hundred ninety-six".