1690587066 has 64 divisors (see below), whose sum is σ = 4101995520. Its totient is φ = 453446400.

The previous prime is 1690587047. The next prime is 1690587079. The reversal of 1690587066 is 6607850961.

1690587066 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296341 + ... + 301991.

It is an arithmetic number, because the mean of its divisors is an integer number (64093680).

Almost surely, 2^1690587066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690587066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2050997760).

1690587066 is an abundant number, since it is smaller than the sum of its proper divisors (2411408454).

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

1690587066 is a wasteful number, since it uses less digits than its factorization.

1690587066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 1690587066 is about 41116.7492148881. The cubic root of 1690587066 is about 1191.2763336610.

The spelling of 1690587066 in words is "one billion, six hundred ninety million, five hundred eighty-seven thousand, sixty-six".