6651407 has 6 divisors (see below), whose sum is σ = 7737408. Its totient is φ = 5701164.

The previous prime is 6651401. The next prime is 6651413. The reversal of 6651407 is 7041566.

It is an interprime number because it is at equal distance from previous prime (6651401) and next prime (6651413).

It is not a de Polignac number, because 6651407 - 2⁶ = 6651343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6651407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67823 + ... + 67920.

It is an arithmetic number, because the mean of its divisors is an integer number (1289568).

Almost surely, 2^6651407 is an apocalyptic number.

6651407 is a deficient number, since it is larger than the sum of its proper divisors (1086001).

6651407 is a wasteful number, since it uses less digits than its factorization.

6651407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135757 (or 135750 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 6651407 is about 2579.0321828159. The cubic root of 6651407 is about 188.0634971118.

The spelling of 6651407 in words is "six million, six hundred fifty-one thousand, four hundred seven".