6634651 has 4 divisors (see below), whose sum is σ = 6848704. Its totient is φ = 6420600.

The previous prime is 6634643. The next prime is 6634673. The reversal of 6634651 is 1564366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1564366 = 2 ⋅782183.

It is a cyclic number.

It is not a de Polignac number, because 6634651 - 2³ = 6634643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 214021 = 6634651 / (6 + 6 + 3 + 4 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6634631) 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, 106980 + ... + 107041.

It is an arithmetic number, because the mean of its divisors is an integer number (1712176).

Almost surely, 2^6634651 is an apocalyptic number.

6634651 is a deficient number, since it is larger than the sum of its proper divisors (214053).

6634651 is a wasteful number, since it uses less digits than its factorization.

6634651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214052.

The product of its digits is 12960, while the sum is 31.

The square root of 6634651 is about 2575.7816289430. The cubic root of 6634651 is about 187.9054432448.

The spelling of 6634651 in words is "six million, six hundred thirty-four thousand, six hundred fifty-one".