7721326607 has 4 divisors (see below), whose sum is σ = 7746477816. Its totient is φ = 7696175400.

The previous prime is 7721326597. The next prime is 7721326621. The reversal of 7721326607 is 7066231277.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7721326607 - 2³² = 3426359311 is a prime.

It is a super-2 number, since 2×7721326607² (a number of 21 digits) contains 22 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 (7721326667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12575144 + ... + 12575757.

It is an arithmetic number, because the mean of its divisors is an integer number (1936619454).

Almost surely, 2^7721326607 is an apocalyptic number.

7721326607 is a deficient number, since it is larger than the sum of its proper divisors (25151209).

7721326607 is a wasteful number, since it uses less digits than its factorization.

7721326607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25151208.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 7721326607 is about 87871.0794687308. The cubic root of 7721326607 is about 1976.5022257346.

The spelling of 7721326607 in words is "seven billion, seven hundred twenty-one million, three hundred twenty-six thousand, six hundred seven".