6656490 has 24 divisors (see below), whose sum is σ = 17307108. Its totient is φ = 1775040.

The previous prime is 6656483. The next prime is 6656497. The reversal of 6656490 is 946566.

It is a happy number.

6656490 is a `hidden beast` number, since 6 + 6 + 5 + 649 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6656483) and next prime (6656497).

It can be written as a sum of positive squares in 2 ways, for example, as 6456681 + 199809 = 2541^2 + 447^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6656497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36891 + ... + 37070.

Almost surely, 2^6656490 is an apocalyptic number.

6656490 is an abundant number, since it is smaller than the sum of its proper divisors (10650618).

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

6656490 is a wasteful number, since it uses less digits than its factorization.

6656490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73974 (or 73971 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6656490 is about 2580.0174418015. The cubic root of 6656490 is about 188.1113909060. Note that the first 3 decimals are identical.

The spelling of 6656490 in words is "six million, six hundred fifty-six thousand, four hundred ninety".