190666666090 has 32 divisors (see below), whose sum is σ = 351698896080. Its totient is φ = 74379379200.

The previous prime is 190666666087. The next prime is 190666666093. The reversal of 190666666090 is 90666666091.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (190666666087) and next prime (190666666093).

It can be written as a sum of positive squares in 8 ways, for example, as 58882419649 + 131784246441 = 242657^2 + 363021^2 .

It is not an unprimeable number, because it can be changed into a prime (190666666093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060120 + ... + 1226860.

Almost surely, 2^190666666090 is an apocalyptic number.

190666666090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190666666090 is a deficient number, since it is larger than the sum of its proper divisors (161032229990).

190666666090 is a wasteful number, since it uses less digits than its factorization.

190666666090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169578.

The product of its (nonzero) digits is 3779136, while the sum is 55.

Subtracting from 190666666090 its reverse (90666666091), we obtain a palindrome (99999999999).

The spelling of 190666666090 in words is "one hundred ninety billion, six hundred sixty-six million, six hundred sixty-six thousand, ninety".