6477649 has 8 divisors (see below), whose sum is σ = 6670400. Its totient is φ = 6286896.

The previous prime is 6477641. The next prime is 6477671. The reversal of 6477649 is 9467746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6477649 - 2³ = 6477641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an Ulam number.

It is a Duffinian number.

6477649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6477641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8179 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (833800).

Almost surely, 2^6477649 is an apocalyptic number.

It is an amenable number.

6477649 is a deficient number, since it is larger than the sum of its proper divisors (192751).

6477649 is a wasteful number, since it uses less digits than its factorization.

6477649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999.

The product of its digits is 254016, while the sum is 43.

The square root of 6477649 is about 2545.1225903677. The cubic root of 6477649 is about 186.4114010139.

The spelling of 6477649 in words is "six million, four hundred seventy-seven thousand, six hundred forty-nine".