66037385 has 4 divisors (see below), whose sum is σ = 79244868. Its totient is φ = 52829904.

The previous prime is 66037337. The next prime is 66037399. The reversal of 66037385 is 58373066.

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 52258441 + 13778944 = 7229^2 + 3712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66037385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6603734 + ... + 6603743.

It is an arithmetic number, because the mean of its divisors is an integer number (19811217).

Almost surely, 2^66037385 is an apocalyptic number.

It is an amenable number.

66037385 is a deficient number, since it is larger than the sum of its proper divisors (13207483).

66037385 is a wasteful number, since it uses less digits than its factorization.

66037385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13207482.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 66037385 is about 8126.3389665950. The cubic root of 66037385 is about 404.2002915778.

The spelling of 66037385 in words is "sixty-six million, thirty-seven thousand, three hundred eighty-five".