7666323678 has 48 divisors (see below), whose sum is σ = 18447585840. Its totient is φ = 2358866016.

The previous prime is 7666323673. The next prime is 7666323703. The reversal of 7666323678 is 8763236667.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666323673) 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, 410901 + ... + 429152.

It is an arithmetic number, because the mean of its divisors is an integer number (384324705).

Almost surely, 2^7666323678 is an apocalyptic number.

7666323678 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7666323678 is an abundant number, since it is smaller than the sum of its proper divisors (10781262162).

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

7666323678 is a wasteful number, since it uses less digits than its factorization.

7666323678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840090 (or 840071 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The square root of 7666323678 is about 87557.5449518772. The cubic root of 7666323678 is about 1971.7978278214.

The spelling of 7666323678 in words is "seven billion, six hundred sixty-six million, three hundred twenty-three thousand, six hundred seventy-eight".