6620788 has 6 divisors (see below), whose sum is σ = 11586386. Its totient is φ = 3310392.

The previous prime is 6620777. The next prime is 6620791. The reversal of 6620788 is 8870266.

It can be written as a sum of positive squares in only one way, i.e., 6411024 + 209764 = 2532^2 + 458^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827595 + ... + 827602.

Almost surely, 2^6620788 is an apocalyptic number.

It is an amenable number.

6620788 is a deficient number, since it is larger than the sum of its proper divisors (4965598).

6620788 is a wasteful number, since it uses less digits than its factorization.

6620788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655201 (or 1655199 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 6620788 is about 2573.0891939457. The cubic root of 6620788 is about 187.7744768186.

The spelling of 6620788 in words is "six million, six hundred twenty thousand, seven hundred eighty-eight".