66537703 has 4 divisors (see below), whose sum is σ = 66922488. Its totient is φ = 66152920.

The previous prime is 66537683. The next prime is 66537707. The reversal of 66537703 is 30773566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66537703 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 (66537707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192133 + ... + 192478.

It is an arithmetic number, because the mean of its divisors is an integer number (16730622).

Almost surely, 2^66537703 is an apocalyptic number.

66537703 is a deficient number, since it is larger than the sum of its proper divisors (384785).

66537703 is a wasteful number, since it uses less digits than its factorization.

66537703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384784.

The product of its (nonzero) digits is 79380, while the sum is 37.

The square root of 66537703 is about 8157.0646068301. The cubic root of 66537703 is about 405.2185032384.

The spelling of 66537703 in words is "sixty-six million, five hundred thirty-seven thousand, seven hundred three".