7666856442 has 48 divisors (see below), whose sum is σ = 19819091520. Its totient is φ = 2190529656.

The previous prime is 7666856423. The next prime is 7666856443. The reversal of 7666856442 is 2446586667.

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

It is not an unprimeable number, because it can be changed into a prime (7666856443) 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, 1446118 + ... + 1451409.

It is an arithmetic number, because the mean of its divisors is an integer number (412897740).

Almost surely, 2^7666856442 is an apocalyptic number.

7666856442 is an abundant number, since it is smaller than the sum of its proper divisors (12152235078).

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

7666856442 is a wasteful number, since it uses less digits than its factorization.

7666856442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897552 (or 2897539 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The square root of 7666856442 is about 87560.5872639054. The cubic root of 7666856442 is about 1971.8435028459.

The spelling of 7666856442 in words is "seven billion, six hundred sixty-six million, eight hundred fifty-six thousand, four hundred forty-two".