66079637 has 4 divisors (see below), whose sum is σ = 71162700. Its totient is φ = 60996576.

The previous prime is 66079633. The next prime is 66079649. The reversal of 66079637 is 73697066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31516996 + 34562641 = 5614^2 + 5879^2 .

It is a cyclic number.

It is not a de Polignac number, because 66079637 - 2² = 66079633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66079633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541512 + ... + 2541537.

It is an arithmetic number, because the mean of its divisors is an integer number (17790675).

Almost surely, 2^66079637 is an apocalyptic number.

It is an amenable number.

66079637 is a deficient number, since it is larger than the sum of its proper divisors (5083063).

66079637 is a wasteful number, since it uses less digits than its factorization.

66079637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083062.

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 66079637 is about 8128.9382455521. The cubic root of 66079637 is about 404.2864782617.

The spelling of 66079637 in words is "sixty-six million, seventy-nine thousand, six hundred thirty-seven".