66486649 has 8 divisors (see below), whose sum is σ = 67392000. Its totient is φ = 65584992.

The previous prime is 66486617. The next prime is 66486653. The reversal of 66486649 is 94668466.

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 66486649 - 2⁵ = 66486617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66486689) 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, 63472 + ... + 64510.

It is an arithmetic number, because the mean of its divisors is an integer number (8424000).

Almost surely, 2^66486649 is an apocalyptic number.

It is an amenable number.

66486649 is a deficient number, since it is larger than the sum of its proper divisors (905351).

66486649 is a wasteful number, since it uses less digits than its factorization.

66486649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847.

The product of its digits is 1492992, while the sum is 49.

The square root of 66486649 is about 8153.9345717267. The cubic root of 66486649 is about 405.1148361040.

The spelling of 66486649 in words is "sixty-six million, four hundred eighty-six thousand, six hundred forty-nine".