6739566840 has 96 divisors (see below), whose sum is σ = 21917310480. Its totient is φ = 1796092416.

The previous prime is 6739566829. The next prime is 6739566851. The reversal of 6739566840 is 486659376.

6739566840 is a `hidden beast` number, since 6 + 7 + 39 + 566 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (6739566829) and next prime (6739566851).

It is a super-2 number, since 2×6739566840² = 90843522381655171200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681612 + ... + 691428.

Almost surely, 2^6739566840 is an apocalyptic number.

6739566840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6739566840 is an abundant number, since it is smaller than the sum of its proper divisors (15177743640).

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

6739566840 is a wasteful number, since it uses less digits than its factorization.

6739566840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11741 (or 11734 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The square root of 6739566840 is about 82094.8648820375. The cubic root of 6739566840 is about 1888.9073721580.

The spelling of 6739566840 in words is "six billion, seven hundred thirty-nine million, five hundred sixty-six thousand, eight hundred forty".