66938796 has 36 divisors (see below), whose sum is σ = 174667584. Its totient is φ = 21592800.

The previous prime is 66938771. The next prime is 66938797. The reversal of 66938796 is 69783966.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (66938797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28875 + ... + 31106.

Almost surely, 2^66938796 is an apocalyptic number.

It is an amenable number.

66938796 is an abundant number, since it is smaller than the sum of its proper divisors (107728788).

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

66938796 is a wasteful number, since it uses less digits than its factorization.

66938796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60022 (or 60017 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 66938796 is about 8181.6132883436. The cubic root of 66938796 is about 406.0310992380.

The spelling of 66938796 in words is "sixty-six million, nine hundred thirty-eight thousand, seven hundred ninety-six".