662990 has 16 divisors (see below), whose sum is σ = 1203552. Its totient is φ = 262944.

The previous prime is 662957. The next prime is 662999. The reversal of 662990 is 99266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662999) by changing a digit.

662990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472 + ... + 1868.

It is an arithmetic number, because the mean of its divisors is an integer number (75222).

2⁶⁶²⁹⁹⁰ is an apocalyptic number.

662990 is a deficient number, since it is larger than the sum of its proper divisors (540562).

662990 is a wasteful number, since it uses less digits than its factorization.

662990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 662990 is about 814.2419787754. The cubic root of 662990 is about 87.1971571331.

The spelling of 662990 in words is "six hundred sixty-two thousand, nine hundred ninety".