6677639 has 4 divisors (see below), whose sum is σ = 6702024. Its totient is φ = 6653256.

The previous prime is 6677623. The next prime is 6677641. The reversal of 6677639 is 9367766.

6677639 = T₆₆ + T₆₇ + ... + T₃₄₂.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6677639 - 2⁴ = 6677623 is a prime.

It is a super-2 number, since 2×6677639² = 89181725228642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6677639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6677239) 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, 11777 + ... + 12330.

It is an arithmetic number, because the mean of its divisors is an integer number (1675506).

Almost surely, 2^6677639 is an apocalyptic number.

6677639 is a deficient number, since it is larger than the sum of its proper divisors (24385).

6677639 is a wasteful number, since it uses less digits than its factorization.

6677639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24384.

The product of its digits is 285768, while the sum is 44.

The square root of 6677639 is about 2584.1128071352. The cubic root of 6677639 is about 188.3104027912.

The spelling of 6677639 in words is "six million, six hundred seventy-seven thousand, six hundred thirty-nine".