6662519394 has 16 divisors (see below), whose sum is σ = 13485582432. Its totient is φ = 2194082528.

The previous prime is 6662519387. The next prime is 6662519401. The reversal of 6662519394 is 4939152666.

It is an interprime number because it is at equal distance from previous prime (6662519387) and next prime (6662519401).

It is a super-2 number, since 2×6662519394² = 88778329350852254472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6688779 + ... + 6689774.

It is an arithmetic number, because the mean of its divisors is an integer number (842848902).

Almost surely, 2^6662519394 is an apocalyptic number.

6662519394 is an abundant number, since it is smaller than the sum of its proper divisors (6823063038).

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

6662519394 is a wasteful number, since it uses less digits than its factorization.

6662519394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13378641.

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

The square root of 6662519394 is about 81624.2573871273. The cubic root of 6662519394 is about 1881.6817035055.

The spelling of 6662519394 in words is "six billion, six hundred sixty-two million, five hundred nineteen thousand, three hundred ninety-four".