1000665490 has 32 divisors (see below), whose sum is σ = 1975959360. Its totient is φ = 361838400.

The previous prime is 1000665469. The next prime is 1000665521. The reversal of 1000665490 is 945660001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5721 + ... + 45100.

It is an arithmetic number, because the mean of its divisors is an integer number (61748730).

Almost surely, 2^1000665490 is an apocalyptic number.

1000665490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000665490 is a deficient number, since it is larger than the sum of its proper divisors (975293870).

1000665490 is a wasteful number, since it uses less digits than its factorization.

1000665490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51018.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1000665490 is about 31633.2971724416. The cubic root of 1000665490 is about 1000.2217808096.

The spelling of 1000665490 in words is "one billion, six hundred sixty-five thousand, four hundred ninety".