6666779057290 has 32 divisors (see below), whose sum is σ = 13542548060160. Its totient is φ = 2340687316800.

The previous prime is 6666779057227. The next prime is 6666779057297. The reversal of 6666779057290 is 927509776666.

It is a super-2 number, since 2×6666779057290² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6666779057297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044946506 + ... + 1044952885.

It is an arithmetic number, because the mean of its divisors is an integer number (423204626880).

Almost surely, 2^{6666779057290} is an apocalyptic number.

6666779057290 is an abundant number, since it is smaller than the sum of its proper divisors (6875769002870).

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

6666779057290 is a wasteful number, since it uses less digits than its factorization.

6666779057290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089899438.

The product of its (nonzero) digits is 360067680, while the sum is 70.

The spelling of 6666779057290 in words is "six trillion, six hundred sixty-six billion, seven hundred seventy-nine million, fifty-seven thousand, two hundred ninety".