721006749007 has 8 divisors (see below), whose sum is σ = 733996648080. Its totient is φ = 708042498240.

The previous prime is 721006748977. The next prime is 721006749017. The reversal of 721006749007 is 700947600127.

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

It is a cyclic number.

It is not a de Polignac number, because 721006749007 - 2⁷ = 721006748879 is a prime.

It is a super-2 number, since 2×721006749007² (a number of 25 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 (721006749017) 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, 6355344 + ... + 6467797.

It is an arithmetic number, because the mean of its divisors is an integer number (91749581010).

Almost surely, 2^721006749007 is an apocalyptic number.

721006749007 is a deficient number, since it is larger than the sum of its proper divisors (12989899073).

721006749007 is a wasteful number, since it uses less digits than its factorization.

721006749007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12824153.

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 721006749007 in words is "seven hundred twenty-one billion, six million, seven hundred forty-nine thousand, seven".