8497665021 has 8 divisors (see below), whose sum is σ = 11355014464. Its totient is φ = 5652712800.

The previous prime is 8497665019. The next prime is 8497665047. The reversal of 8497665021 is 1205667948.

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

It is not a de Polignac number, because 8497665021 - 2¹ = 8497665019 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 (8497625021) 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, 3097705 + ... + 3100446.

It is an arithmetic number, because the mean of its divisors is an integer number (1419376808).

Almost surely, 2^8497665021 is an apocalyptic number.

It is an amenable number.

8497665021 is a deficient number, since it is larger than the sum of its proper divisors (2857349443).

8497665021 is a wasteful number, since it uses less digits than its factorization.

8497665021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6198611.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 8497665021 is about 92182.7805015666. The cubic root of 8497665021 is about 2040.6406597474.

The spelling of 8497665021 in words is "eight billion, four hundred ninety-seven million, six hundred sixty-five thousand, twenty-one".