97866507621 has 8 divisors (see below), whose sum is σ = 131107107424. Its totient is φ = 64935123120.

The previous prime is 97866507601. The next prime is 97866507659. The reversal of 97866507621 is 12670566879.

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

It is not a de Polignac number, because 97866507621 - 2⁵ = 97866507589 is a prime.

It is a super-3 number, since 3×97866507621³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97866507601) 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, 77303086 + ... + 77304351.

It is an arithmetic number, because the mean of its divisors is an integer number (16388388428).

Almost surely, 2^97866507621 is an apocalyptic number.

It is an amenable number.

97866507621 is a deficient number, since it is larger than the sum of its proper divisors (33240599803).

97866507621 is a wasteful number, since it uses less digits than its factorization.

97866507621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154607651.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 97866507621 in words is "ninety-seven billion, eight hundred sixty-six million, five hundred seven thousand, six hundred twenty-one".