4166691640 has 128 divisors (see below), whose sum is σ = 10060200000. Its totient is φ = 1548619776.

The previous prime is 4166691623. The next prime is 4166691649. The reversal of 4166691640 is 461966614.

It is a super-2 number, since 2×4166691640² = 34722638445691779200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166691649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15489426 + ... + 15489694.

Almost surely, 2^4166691640 is an apocalyptic number.

4166691640 is a gapful number since it is divisible by the number (40) 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 4166691640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5030100000).

4166691640 is an abundant number, since it is smaller than the sum of its proper divisors (5893508360).

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

4166691640 is a wasteful number, since it uses less digits than its factorization.

4166691640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 4166691640 is about 64549.9158791086. The cubic root of 4166691640 is about 1609.1521892014.

The spelling of 4166691640 in words is "four billion, one hundred sixty-six million, six hundred ninety-one thousand, six hundred forty".