6650164405 has 4 divisors (see below), whose sum is σ = 7980197292. Its totient is φ = 5320131520.

The previous prime is 6650164387. The next prime is 6650164421. The reversal of 6650164405 is 5044610566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3331367524 + 3318796881 = 57718^2 + 57609^2 .

It is not a de Polignac number, because 6650164405 - 2⁷ = 6650164277 is a prime.

It is a super-2 number, since 2×6650164405² = 88449373227058008050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665016436 + ... + 665016445.

It is an arithmetic number, because the mean of its divisors is an integer number (1995049323).

Almost surely, 2^6650164405 is an apocalyptic number.

It is an amenable number.

6650164405 is a deficient number, since it is larger than the sum of its proper divisors (1330032887).

6650164405 is a wasteful number, since it uses less digits than its factorization.

6650164405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330032886.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 6650164405 is about 81548.5401770013. The cubic root of 6650164405 is about 1880.5178523819.

The spelling of 6650164405 in words is "six billion, six hundred fifty million, one hundred sixty-four thousand, four hundred five".