7776491420 has 24 divisors (see below), whose sum is σ = 16367022000. Its totient is φ = 3103665152.

The previous prime is 7776491389. The next prime is 7776491423. The reversal of 7776491420 is 241946777.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7776491423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424010 + ... + 441969.

It is an arithmetic number, because the mean of its divisors is an integer number (681959250).

Almost surely, 2^7776491420 is an apocalyptic number.

It is an amenable number.

7776491420 is an abundant number, since it is smaller than the sum of its proper divisors (8590530580).

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

7776491420 is a wasteful number, since it uses less digits than its factorization.

7776491420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866437 (or 866435 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 7776491420 is about 88184.4171041574. The cubic root of 7776491420 is about 1981.1980828478.

The spelling of 7776491420 in words is "seven billion, seven hundred seventy-six million, four hundred ninety-one thousand, four hundred twenty".