3778692660 has 48 divisors (see below), whose sum is σ = 11755934400. Its totient is φ = 1007651232.

The previous prime is 3778692653. The next prime is 3778692661. The reversal of 3778692660 is 662968773.

3778692660 is a `hidden beast` number, since 377 + 8 + 6 + 9 + 266 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 3778692597 and 3778692606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778692661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3498250 + ... + 3499329.

It is an arithmetic number, because the mean of its divisors is an integer number (244915300).

Almost surely, 2^3778692660 is an apocalyptic number.

3778692660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3778692660 is an abundant number, since it is smaller than the sum of its proper divisors (7977241740).

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

3778692660 is a wasteful number, since it uses less digits than its factorization.

3778692660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6997597 (or 6997589 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The square root of 3778692660 is about 61471.0717329705. The cubic root of 3778692660 is about 1557.5686237302.

The spelling of 3778692660 in words is "three billion, seven hundred seventy-eight million, six hundred ninety-two thousand, six hundred sixty".