6720477 has 4 divisors (see below), whose sum is σ = 8960640. Its totient is φ = 4480316.

The previous prime is 6720473. The next prime is 6720481. The reversal of 6720477 is 7740276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (6720473) and next prime (6720481).

It is a cyclic number.

It is not a de Polignac number, because 6720477 - 2² = 6720473 is a prime.

It is a super-2 number, since 2×6720477² = 90329622215058, which contains 22 as substring.

It is a D-number.

6720477 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120077 + ... + 1120082.

It is an arithmetic number, because the mean of its divisors is an integer number (2240160).

Almost surely, 2^6720477 is an apocalyptic number.

It is an amenable number.

6720477 is a deficient number, since it is larger than the sum of its proper divisors (2240163).

6720477 is a wasteful number, since it uses less digits than its factorization.

6720477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240162.

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 6720477 is about 2592.3882811030. The cubic root of 6720477 is about 188.7122240674.

The spelling of 6720477 in words is "six million, seven hundred twenty thousand, four hundred seventy-seven".