6400977 has 16 divisors (see below), whose sum is σ = 9510912. Its totient is φ = 3795920.

The previous prime is 6400957. The next prime is 6400981. The reversal of 6400977 is 7790046.

It is a cyclic number.

It is not a de Polignac number, because 6400977 - 2¹¹ = 6398929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (6400957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513 + ... + 3614.

It is an arithmetic number, because the mean of its divisors is an integer number (594432).

Almost surely, 2^6400977 is an apocalyptic number.

It is an amenable number.

6400977 is a deficient number, since it is larger than the sum of its proper divisors (3109935).

6400977 is a wasteful number, since it uses less digits than its factorization.

6400977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 6400977 is about 2530.0152173455. The cubic root of 6400977 is about 185.6730004311.

The spelling of 6400977 in words is "six million, four hundred thousand, nine hundred seventy-seven".