66077425 has 6 divisors (see below), whose sum is σ = 81936038. Its totient is φ = 52861920.

The previous prime is 66077411. The next prime is 66077443. The reversal of 66077425 is 52477066.

66077425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 6355441 + 59721984 = 2521^2 + 7728^2 .

It is not a de Polignac number, because 66077425 - 2¹³ = 66069233 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 1321524 + ... + 1321573.

Almost surely, 2^66077425 is an apocalyptic number.

It is an amenable number.

66077425 is a deficient number, since it is larger than the sum of its proper divisors (15858613).

66077425 is a wasteful number, since it uses less digits than its factorization.

66077425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643107 (or 2643102 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 66077425 is about 8128.8021872844. The cubic root of 66077425 is about 404.2819670804.

The spelling of 66077425 in words is "sixty-six million, seventy-seven thousand, four hundred twenty-five".