7664718977 has 4 divisors (see below), whose sum is σ = 7665067776. Its totient is φ = 7664370180.

The previous prime is 7664718931. The next prime is 7664719021. The reversal of 7664718977 is 7798174667.

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 7664718977 - 2¹⁰ = 7664717953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664718577) 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, 139049 + ... + 186182.

It is an arithmetic number, because the mean of its divisors is an integer number (1916266944).

Almost surely, 2^7664718977 is an apocalyptic number.

It is an amenable number.

7664718977 is a deficient number, since it is larger than the sum of its proper divisors (348799).

7664718977 is a wasteful number, since it uses less digits than its factorization.

7664718977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348798.

The product of its digits is 24893568, while the sum is 62.

The square root of 7664718977 is about 87548.3807788585. The cubic root of 7664718977 is about 1971.6602405034.

The spelling of 7664718977 in words is "seven billion, six hundred sixty-four million, seven hundred eighteen thousand, nine hundred seventy-seven".