66372783 has 16 divisors (see below), whose sum is σ = 91125216. Its totient is φ = 42940800.

The previous prime is 66372749. The next prime is 66372799. The reversal of 66372783 is 38727366.

It is not a de Polignac number, because 66372783 - 2¹⁰ = 66371759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66372703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77385 + ... + 78237.

It is an arithmetic number, because the mean of its divisors is an integer number (5695326).

Almost surely, 2^66372783 is an apocalyptic number.

66372783 is a deficient number, since it is larger than the sum of its proper divisors (24752433).

66372783 is a wasteful number, since it uses less digits than its factorization.

66372783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594.

The product of its digits is 254016, while the sum is 42.

The square root of 66372783 is about 8146.9493063355. The cubic root of 66372783 is about 404.8834354377.

The spelling of 66372783 in words is "sixty-six million, three hundred seventy-two thousand, seven hundred eighty-three".