6650397 has 16 divisors (see below), whose sum is σ = 10610880. Its totient is φ = 4092336.

The previous prime is 6650393. The next prime is 6650431. The reversal of 6650397 is 7930566.

It is a happy number.

6650397 is a `hidden beast` number, since 66 + 503 + 97 = 666.

It is not a de Polignac number, because 6650397 - 2² = 6650393 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650393) 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 15 ways as a sum of consecutive naturals, for example, 9123 + ... + 9824.

It is an arithmetic number, because the mean of its divisors is an integer number (663180).

Almost surely, 2^6650397 is an apocalyptic number.

It is an amenable number.

6650397 is a deficient number, since it is larger than the sum of its proper divisors (3960483).

6650397 is a wasteful number, since it uses less digits than its factorization.

6650397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18969 (or 18963 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 6650397 is about 2578.8363654951. The cubic root of 6650397 is about 188.0539776349.

The spelling of 6650397 in words is "six million, six hundred fifty thousand, three hundred ninety-seven".