80669090 has 8 divisors (see below), whose sum is σ = 145204380. Its totient is φ = 32267632.

The previous prime is 80669081. The next prime is 80669093. The reversal of 80669090 is 9096608.

It can be written as a sum of positive squares in 2 ways, for example, as 79941481 + 727609 = 8941^2 + 853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (80669093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4033445 + ... + 4033464.

Almost surely, 2^80669090 is an apocalyptic number.

80669090 is a deficient number, since it is larger than the sum of its proper divisors (64535290).

80669090 is a wasteful number, since it uses less digits than its factorization.

80669090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8066916.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 80669090 is about 8981.5972966951. The cubic root of 80669090 is about 432.0848634435.

It can be divided in two parts, 806 and 69090, that added together give a palindrome (69896).

The spelling of 80669090 in words is "eighty million, six hundred sixty-nine thousand, ninety".