720706851 has 6 divisors (see below), whose sum is σ = 1041021020. Its totient is φ = 480471228.

The previous prime is 720706837. The next prime is 720706853. The reversal of 720706851 is 158607027.

It is not a de Polignac number, because 720706851 - 2⁹ = 720706339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720706853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40039261 + ... + 40039278.

Almost surely, 2^720706851 is an apocalyptic number.

720706851 is a deficient number, since it is larger than the sum of its proper divisors (320314169).

720706851 is a wasteful number, since it uses less digits than its factorization.

720706851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80078545 (or 80078542 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 720706851 is about 26845.9838895877. The cubic root of 720706851 is about 896.5741575873.

The spelling of 720706851 in words is "seven hundred twenty million, seven hundred six thousand, eight hundred fifty-one".