7700556 has 12 divisors (see below), whose sum is σ = 17967992. Its totient is φ = 2566848.

The previous prime is 7700531. The next prime is 7700557. The reversal of 7700556 is 6550077.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7700557) 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, 320845 + ... + 320868.

Almost surely, 2^7700556 is an apocalyptic number.

It is an amenable number.

7700556 is an abundant number, since it is smaller than the sum of its proper divisors (10267436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7700556 is a wasteful number, since it uses less digits than its factorization.

7700556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641720 (or 641718 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 7700556 is about 2774.9875675397. The cubic root of 7700556 is about 197.4728350183.

It can be divided in two parts, 7700 and 556, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 7700556 in words is "seven million, seven hundred thousand, five hundred fifty-six".