66077590 has 16 divisors (see below), whose sum is σ = 120096288. Its totient is φ = 26174016.

The previous prime is 66077587. The next prime is 66077651. The reversal of 66077590 is 9577066.

66077590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31047 + ... + 33106.

It is an arithmetic number, because the mean of its divisors is an integer number (7506018).

Almost surely, 2^66077590 is an apocalyptic number.

66077590 is a deficient number, since it is larger than the sum of its proper divisors (54018698).

66077590 is a wasteful number, since it uses less digits than its factorization.

66077590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64263.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 66077590 is about 8128.8123363749. The cubic root of 66077590 is about 404.2823035870.

The spelling of 66077590 in words is "sixty-six million, seventy-seven thousand, five hundred ninety".