6620167 has 4 divisors (see below), whose sum is σ = 6625440. Its totient is φ = 6614896.

The previous prime is 6620101. The next prime is 6620171. The reversal of 6620167 is 7610266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7610266 = 2 ⋅3805133.

It is a cyclic number.

It is not a de Polignac number, because 6620167 - 2⁷ = 6620039 is a prime.

It is a super-2 number, since 2×6620167² = 87653222215778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630167) 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, 459 + ... + 3667.

It is an arithmetic number, because the mean of its divisors is an integer number (1656360).

Almost surely, 2^6620167 is an apocalyptic number.

6620167 is a deficient number, since it is larger than the sum of its proper divisors (5273).

6620167 is a wasteful number, since it uses less digits than its factorization.

6620167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 6620167 is about 2572.9685190457. The cubic root of 6620167 is about 187.7686058359.

Subtracting 6620167 from its reverse (7610266), we obtain a palindrome (990099).

The spelling of 6620167 in words is "six million, six hundred twenty thousand, one hundred sixty-seven".