7470077778 has 48 divisors (see below), whose sum is σ = 16679773656. Its totient is φ = 2414396160.

The previous prime is 7470077761. The next prime is 7470077789. The reversal of 7470077778 is 8777700747.

It can be written as a sum of positive squares in 4 ways, for example, as 6220950129 + 1249127649 = 78873^2 + 35343^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175998 + ... + 214278.

Almost surely, 2^7470077778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7470077778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8339886828).

7470077778 is an abundant number, since it is smaller than the sum of its proper divisors (9209695878).

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

7470077778 is a wasteful number, since it uses less digits than its factorization.

7470077778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38619 (or 38616 counting only the distinct ones).

The product of its (nonzero) digits is 3764768, while the sum is 54.

The square root of 7470077778 is about 86429.6116964551. The cubic root of 7470077778 is about 1954.8272057255.

The spelling of 7470077778 in words is "seven billion, four hundred seventy million, seventy-seven thousand, seven hundred seventy-eight".