7321665620 has 24 divisors (see below), whose sum is σ = 15395067744. Its totient is φ = 2924938656.

The previous prime is 7321665619. The next prime is 7321665623. The reversal of 7321665620 is 265661237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7321665623) 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, 216842 + ... + 248321.

It is an arithmetic number, because the mean of its divisors is an integer number (641461156).

Almost surely, 2^7321665620 is an apocalyptic number.

It is an amenable number.

7321665620 is an abundant number, since it is smaller than the sum of its proper divisors (8073402124).

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

7321665620 is a wasteful number, since it uses less digits than its factorization.

7321665620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465959 (or 465957 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 7321665620 is about 85566.7319698491. The cubic root of 7321665620 is about 1941.7946354245.

The spelling of 7321665620 in words is "seven billion, three hundred twenty-one million, six hundred sixty-five thousand, six hundred twenty".