2666690500290 has 128 divisors (see below), whose sum is σ = 6777265489920. Its totient is φ = 670175734272.

The previous prime is 2666690500289. The next prime is 2666690500303. The reversal of 2666690500290 is 920050966662.

2666690500290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2666690500290² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17302309 + ... + 17455751.

It is an arithmetic number, because the mean of its divisors is an integer number (52947386640).

Almost surely, 2^{2666690500290} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666690500290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3388632744960).

2666690500290 is an abundant number, since it is smaller than the sum of its proper divisors (4110574989630).

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

2666690500290 is a wasteful number, since it uses less digits than its factorization.

2666690500290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153848.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 2666690500290 in words is "two trillion, six hundred sixty-six billion, six hundred ninety million, five hundred thousand, two hundred ninety".