5665721494 has 8 divisors (see below), whose sum is σ = 8525909808. Its totient is φ = 2823751560.

The previous prime is 5665721483. The next prime is 5665721507. The reversal of 5665721494 is 4941275665.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4553817 + ... + 4555060.

It is an arithmetic number, because the mean of its divisors is an integer number (1065738726).

Almost surely, 2^5665721494 is an apocalyptic number.

5665721494 is a deficient number, since it is larger than the sum of its proper divisors (2860188314).

5665721494 is a wasteful number, since it uses less digits than its factorization.

5665721494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109190.

The product of its digits is 1814400, while the sum is 49.

The square root of 5665721494 is about 75270.9870667311. The cubic root of 5665721494 is about 1782.7279525824.

The spelling of 5665721494 in words is "five billion, six hundred sixty-five million, seven hundred twenty-one thousand, four hundred ninety-four".