5380021661 has 8 divisors (see below), whose sum is σ = 6149307840. Its totient is φ = 4610913408.

The previous prime is 5380021657. The next prime is 5380021687. The reversal of 5380021661 is 1661200835.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5380021661 - 2² = 5380021657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5380021631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28250 + ... + 107508.

It is an arithmetic number, because the mean of its divisors is an integer number (768663480).

Almost surely, 2^5380021661 is an apocalyptic number.

It is an amenable number.

5380021661 is a deficient number, since it is larger than the sum of its proper divisors (769286179).

5380021661 is an equidigital number, since it uses as much as digits as its factorization.

5380021661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88963.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 5380021661 is about 73348.6309415520. The cubic root of 5380021661 is about 1752.2443759751.

The spelling of 5380021661 in words is "five billion, three hundred eighty million, twenty-one thousand, six hundred sixty-one".