5421665340 has 864 divisors, whose sum is σ = 22560685056. Its totient is φ = 1067489280.

The previous prime is 5421665339. The next prime is 5421665351. The reversal of 5421665340 is 435661245.

5421665340 is a `hidden beast` number, since 542 + 1 + 66 + 53 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5421665295 and 5421665304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 132235720 + ... + 132235760.

It is an arithmetic number, because the mean of its divisors is an integer number (26111904).

Almost surely, 2^5421665340 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 5421665340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11280342528).

5421665340 is an abundant number, since it is smaller than the sum of its proper divisors (17139019716).

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

5421665340 is a wasteful number, since it uses less digits than its factorization.

5421665340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 5421665340 is about 73631.9586864291. The cubic root of 5421665340 is about 1756.7538023662.

It can be divided in two parts, 5421 and 665340, that added together give a square (670761 = 819²).

The spelling of 5421665340 in words is "five billion, four hundred twenty-one million, six hundred sixty-five thousand, three hundred forty".