7810666551072 has 864 divisors, whose sum is σ = 29411433297792. Its totient is φ = 1995383808000.

The previous prime is 7810666551019. The next prime is 7810666551209. The reversal of 7810666551072 is 2701556660187.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (864).

It is a super-2 number, since 2×7810666551072² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 401752872 + ... + 401772312.

Almost surely, 2^{7810666551072} is an apocalyptic number.

7810666551072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7810666551072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14705716648896).

7810666551072 is an abundant number, since it is smaller than the sum of its proper divisors (21600766746720).

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

7810666551072 is a wasteful number, since it uses less digits than its factorization.

7810666551072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19556 (or 19525 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 7810666551072 in words is "seven trillion, eight hundred ten billion, six hundred sixty-six million, five hundred fifty-one thousand, seventy-two".