66577445 has 8 divisors (see below), whose sum is σ = 87156000. Its totient is φ = 48419920.

The previous prime is 66577421. The next prime is 66577447. The reversal of 66577445 is 54477566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66577445 - 2²² = 62383141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66577396 and 66577405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66577447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605195 + ... + 605304.

It is an arithmetic number, because the mean of its divisors is an integer number (10894500).

Almost surely, 2^66577445 is an apocalyptic number.

It is an amenable number.

66577445 is a deficient number, since it is larger than the sum of its proper divisors (20578555).

66577445 is a wasteful number, since it uses less digits than its factorization.

66577445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210515.

The product of its digits is 705600, while the sum is 44.

The square root of 66577445 is about 8159.5002910718. The cubic root of 66577445 is about 405.2991642162.

It can be divided in two parts, 6657744 and 5, that multiplied together give a triangular number (33288720 = T₈₁₅₉).

The spelling of 66577445 in words is "sixty-six million, five hundred seventy-seven thousand, four hundred forty-five".