6618690 has 48 divisors (see below), whose sum is σ = 18535608. Its totient is φ = 1628928.

The previous prime is 6618659. The next prime is 6618701. The reversal of 6618690 is 968166.

6618690 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2614689 + 4004001 = 1617^2 + 2001^2 .

It is a super-2 number, since 2×6618690² = 87614114632200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1659 + ... + 3998.

Almost surely, 2^6618690 is an apocalyptic number.

6618690 is an abundant number, since it is smaller than the sum of its proper divisors (11916918).

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

6618690 is a wasteful number, since it uses less digits than its factorization.

6618690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683 (or 5680 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6618690 is about 2572.6814804791. The cubic root of 6618690 is about 187.7546406868.

The spelling of 6618690 in words is "six million, six hundred eighteen thousand, six hundred ninety".