3661105420 has 48 divisors (see below), whose sum is σ = 8973619200. Its totient is φ = 1228526784.

The previous prime is 3661105411. The next prime is 3661105423. The reversal of 3661105420 is 245011663.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (3661105423) 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, 271620 + ... + 284779.

It is an arithmetic number, because the mean of its divisors is an integer number (186950400).

Almost surely, 2^3661105420 is an apocalyptic number.

It is an amenable number.

3661105420 is an abundant number, since it is smaller than the sum of its proper divisors (5312513780).

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

3661105420 is a wasteful number, since it uses less digits than its factorization.

3661105420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556462 (or 556460 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 3661105420 is about 60507.0691737751. The cubic root of 3661105420 is about 1541.2416786315.

The spelling of 3661105420 in words is "three billion, six hundred sixty-one million, one hundred five thousand, four hundred twenty".