7770690720 has 384 divisors, whose sum is σ = 29491257600. Its totient is φ = 1899638784.

The previous prime is 7770690713. The next prime is 7770690727. The reversal of 7770690720 is 270960777.

It is an interprime number because it is at equal distance from previous prime (7770690713) and next prime (7770690727).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (7770690727) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10052254 + ... + 10053026.

It is an arithmetic number, because the mean of its divisors is an integer number (76800150).

Almost surely, 2^7770690720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7770690720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14745628800).

7770690720 is an abundant number, since it is smaller than the sum of its proper divisors (21720566880).

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

7770690720 is a wasteful number, since it uses less digits than its factorization.

7770690720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 259308, while the sum is 45.

The square root of 7770690720 is about 88151.5213708760. The cubic root of 7770690720 is about 1980.7053501672.

The spelling of 7770690720 in words is "seven billion, seven hundred seventy million, six hundred ninety thousand, seven hundred twenty".