7690664881 has 4 divisors (see below), whose sum is σ = 7805450992. Its totient is φ = 7575878772.

The previous prime is 7690664873. The next prime is 7690664929. The reversal of 7690664881 is 1884660967.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7690664881 - 2³ = 7690664873 is a prime.

It is a super-2 number, since 2×7690664881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7690664281) 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, 57392955 + ... + 57393088.

It is an arithmetic number, because the mean of its divisors is an integer number (1951362748).

Almost surely, 2^7690664881 is an apocalyptic number.

It is an amenable number.

7690664881 is a deficient number, since it is larger than the sum of its proper divisors (114786111).

7690664881 is a wasteful number, since it uses less digits than its factorization.

7690664881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114786110.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 7690664881 is about 87696.4359652090. The cubic root of 7690664881 is about 1973.8824960244.

The spelling of 7690664881 in words is "seven billion, six hundred ninety million, six hundred sixty-four thousand, eight hundred eighty-one".