6951720870 has 48 divisors (see below), whose sum is σ = 18085028832. Its totient is φ = 1852709760.

The previous prime is 6951720863. The next prime is 6951720871. The reversal of 6951720870 is 780271596.

6951720870 is a `hidden beast` number, since 69 + 517 + 2 + 0 + 8 + 70 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6951720871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138810 + ... + 182130.

It is an arithmetic number, because the mean of its divisors is an integer number (376771434).

Almost surely, 2^6951720870 is an apocalyptic number.

6951720870 is an abundant number, since it is smaller than the sum of its proper divisors (11133307962).

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

6951720870 is a wasteful number, since it uses less digits than its factorization.

6951720870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45117 (or 45114 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 6951720870 is about 83376.9804562386. The cubic root of 6951720870 is about 1908.5231925586.

It can be divided in two parts, 6951 and 720870, that added together give a triangular number (727821 = T₁₂₀₆).

The spelling of 6951720870 in words is "six billion, nine hundred fifty-one million, seven hundred twenty thousand, eight hundred seventy".