66194937 has 12 divisors (see below), whose sum is σ = 96493540. Its totient is φ = 43724448.

The previous prime is 66194929. The next prime is 66194939. The reversal of 66194937 is 73949166.

It can be written as a sum of positive squares in 2 ways, for example, as 46294416 + 19900521 = 6804^2 + 4461^2 .

It is not a de Polignac number, because 66194937 - 2³ = 66194929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66194892 and 66194901.

It is not an unprimeable number, because it can be changed into a prime (66194939) 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, 32758 + ... + 34719.

Almost surely, 2^66194937 is an apocalyptic number.

It is an amenable number.

66194937 is a deficient number, since it is larger than the sum of its proper divisors (30298603).

66194937 is a wasteful number, since it uses less digits than its factorization.

66194937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67592 (or 67589 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 66194937 is about 8136.0271017248. The cubic root of 66194937 is about 404.5214833126.

The spelling of 66194937 in words is "sixty-six million, one hundred ninety-four thousand, nine hundred thirty-seven".