6650491 has 4 divisors (see below), whose sum is σ = 6830272. Its totient is φ = 6470712.

The previous prime is 6650467. The next prime is 6650503. The reversal of 6650491 is 1940566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6650491 - 2⁵ = 6650459 is a prime.

It is a Duffinian number.

6650491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6650431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89835 + ... + 89908.

It is an arithmetic number, because the mean of its divisors is an integer number (1707568).

Almost surely, 2^6650491 is an apocalyptic number.

6650491 is a deficient number, since it is larger than the sum of its proper divisors (179781).

6650491 is a wasteful number, since it uses less digits than its factorization.

6650491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179780.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 6650491 is about 2578.8545907050. The cubic root of 6650491 is about 188.0548636467.

The spelling of 6650491 in words is "six million, six hundred fifty thousand, four hundred ninety-one".