7661419899 has 16 divisors (see below), whose sum is σ = 12182134272. Its totient is φ = 4187608128.

The previous prime is 7661419891. The next prime is 7661419919. The reversal of 7661419899 is 9989141667.

It is a happy number.

It is not a de Polignac number, because 7661419899 - 2³ = 7661419891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7661419891) 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, 7930594 + ... + 7931559.

It is an arithmetic number, because the mean of its divisors is an integer number (761383392).

Almost surely, 2^7661419899 is an apocalyptic number.

7661419899 is a deficient number, since it is larger than the sum of its proper divisors (4520714373).

7661419899 is a wasteful number, since it uses less digits than its factorization.

7661419899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15862186.

The product of its digits is 5878656, while the sum is 60.

The square root of 7661419899 is about 87529.5372945613. The cubic root of 7661419899 is about 1971.3773166971.

The spelling of 7661419899 in words is "seven billion, six hundred sixty-one million, four hundred nineteen thousand, eight hundred ninety-nine".