66200437 has 4 divisors (see below), whose sum is σ = 67989676. Its totient is φ = 64411200.

The previous prime is 66200429. The next prime is 66200443. The reversal of 66200437 is 73400266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73400266 = 2 ⋅36700133.

It can be written as a sum of positive squares in 2 ways, for example, as 50566321 + 15634116 = 7111^2 + 3954^2 .

It is a cyclic number.

It is not a de Polignac number, because 66200437 - 2³ = 66200429 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 (66200447) 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, 894564 + ... + 894637.

It is an arithmetic number, because the mean of its divisors is an integer number (16997419).

Almost surely, 2^66200437 is an apocalyptic number.

It is an amenable number.

66200437 is a deficient number, since it is larger than the sum of its proper divisors (1789239).

66200437 is a wasteful number, since it uses less digits than its factorization.

66200437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789238.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 66200437 is about 8136.3650975113. The cubic root of 66200437 is about 404.5326866193.

The spelling of 66200437 in words is "sixty-six million, two hundred thousand, four hundred thirty-seven".