1906664590 has 16 divisors (see below), whose sum is σ = 3434085072. Its totient is φ = 762201664.

The previous prime is 1906664587. The next prime is 1906664593. The reversal of 1906664590 is 954666091.

It is an interprime number because it is at equal distance from previous prime (1906664587) and next prime (1906664593).

It is a self number, because there is not a number n which added to its sum of digits gives 1906664590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906664593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40519 + ... + 73858.

It is an arithmetic number, because the mean of its divisors is an integer number (214630317).

Almost surely, 2^1906664590 is an apocalyptic number.

1906664590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1906664590 is a deficient number, since it is larger than the sum of its proper divisors (1527420482).

1906664590 is a wasteful number, since it uses less digits than its factorization.

1906664590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116051.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1906664590 is about 43665.3706041756. The cubic root of 1906664590 is about 1240.0087993652.

The spelling of 1906664590 in words is "one billion, nine hundred six million, six hundred sixty-four thousand, five hundred ninety".