66287649 has 8 divisors (see below), whose sum is σ = 91431360. Its totient is φ = 42667856.

The previous prime is 66287647. The next prime is 66287653. The reversal of 66287649 is 94678266.

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

It is a cyclic number.

It is not a de Polignac number, because 66287649 - 2¹ = 66287647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66287598 and 66287607.

It is not an unprimeable number, because it can be changed into a prime (66287647) 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, 380877 + ... + 381050.

It is an arithmetic number, because the mean of its divisors is an integer number (11428920).

Almost surely, 2^66287649 is an apocalyptic number.

It is an amenable number.

66287649 is a deficient number, since it is larger than the sum of its proper divisors (25143711).

66287649 is a wasteful number, since it uses less digits than its factorization.

66287649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761959.

The product of its digits is 870912, while the sum is 48.

The square root of 66287649 is about 8141.7227292509. The cubic root of 66287649 is about 404.7102515267.

The spelling of 66287649 in words is "sixty-six million, two hundred eighty-seven thousand, six hundred forty-nine".