66037761 has 20 divisors (see below), whose sum is σ = 102940992. Its totient is φ = 42109848.

The previous prime is 66037753. The next prime is 66037793. The reversal of 66037761 is 16773066.

66037761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66037761 - 2³ = 66037753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66037721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15861 + ... + 19586.

Almost surely, 2^66037761 is an apocalyptic number.

It is an amenable number.

66037761 is a deficient number, since it is larger than the sum of its proper divisors (36903231).

66037761 is a wasteful number, since it uses less digits than its factorization.

66037761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35482 (or 35473 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 66037761 is about 8126.3621012111. The cubic root of 66037761 is about 404.2010587141.

The spelling of 66037761 in words is "sixty-six million, thirty-seven thousand, seven hundred sixty-one".