6650407 has 4 divisors (see below), whose sum is σ = 6668896. Its totient is φ = 6631920.

The previous prime is 6650393. The next prime is 6650431. The reversal of 6650407 is 7040566.

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 6650407 - 2⁷ = 6650279 is a prime.

It is a Duffinian number.

6650407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650467) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8694 + ... + 9427.

It is an arithmetic number, because the mean of its divisors is an integer number (1667224).

Almost surely, 2^6650407 is an apocalyptic number.

6650407 is a deficient number, since it is larger than the sum of its proper divisors (18489).

6650407 is a wasteful number, since it uses less digits than its factorization.

6650407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18488.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 6650407 is about 2578.8383043533. The cubic root of 6650407 is about 188.0540718918.

The spelling of 6650407 in words is "six million, six hundred fifty thousand, four hundred seven".