66437287 has 6 divisors (see below), whose sum is σ = 77284248. Its totient is φ = 56946204.

The previous prime is 66437269. The next prime is 66437291. The reversal of 66437287 is 78273466.

It is a happy number.

It is not a de Polignac number, because 66437287 - 2¹⁹ = 65912999 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 (66437297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677883 + ... + 677980.

It is an arithmetic number, because the mean of its divisors is an integer number (12880708).

Almost surely, 2^66437287 is an apocalyptic number.

66437287 is a deficient number, since it is larger than the sum of its proper divisors (10846961).

66437287 is a wasteful number, since it uses less digits than its factorization.

66437287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355877 (or 1355870 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 66437287 is about 8150.9071274307. The cubic root of 66437287 is about 405.0145541688.

The spelling of 66437287 in words is "sixty-six million, four hundred thirty-seven thousand, two hundred eighty-seven".