6700121780 has 24 divisors (see below), whose sum is σ = 15349370400. Its totient is φ = 2436407840.

The previous prime is 6700121777. The next prime is 6700121783. The reversal of 6700121780 is 871210076.

It is an interprime number because it is at equal distance from previous prime (6700121777) and next prime (6700121783).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6700121783) 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, 15227330 + ... + 15227769.

It is an arithmetic number, because the mean of its divisors is an integer number (639557100).

Almost surely, 2^6700121780 is an apocalyptic number.

It is an amenable number.

6700121780 is an abundant number, since it is smaller than the sum of its proper divisors (8649248620).

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

6700121780 is a wasteful number, since it uses less digits than its factorization.

6700121780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30455119 (or 30455117 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 6700121780 is about 81854.2716050910. The cubic root of 6700121780 is about 1885.2150528472.

The spelling of 6700121780 in words is "six billion, seven hundred million, one hundred twenty-one thousand, seven hundred eighty".