7642166805 has 64 divisors (see below), whose sum is σ = 16721349120. Its totient is φ = 3224821248.

The previous prime is 7642166801. The next prime is 7642166821. The reversal of 7642166805 is 5086612467.

It is not a de Polignac number, because 7642166805 - 2² = 7642166801 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7642166801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298752 + ... + 323321.

It is an arithmetic number, because the mean of its divisors is an integer number (261271080).

Almost surely, 2^7642166805 is an apocalyptic number.

It is an amenable number.

7642166805 is an abundant number, since it is smaller than the sum of its proper divisors (9079182315).

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

7642166805 is a wasteful number, since it uses less digits than its factorization.

7642166805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622107 (or 622101 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 7642166805 is about 87419.4875585530. The cubic root of 7642166805 is about 1969.7245790674.

The spelling of 7642166805 in words is "seven billion, six hundred forty-two million, one hundred sixty-six thousand, eight hundred five".