6497780 has 12 divisors (see below), whose sum is σ = 13645380. Its totient is φ = 2599104.

The previous prime is 6497779. The next prime is 6497807. The reversal of 6497780 is 877946.

It can be written as a sum of positive squares in 2 ways, for example, as 2521744 + 3976036 = 1588^2 + 1994^2 .

It is a super-2 number, since 2×6497780² = 84442289856800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162425 + ... + 162464.

It is an arithmetic number, because the mean of its divisors is an integer number (1137115).

Almost surely, 2^6497780 is an apocalyptic number.

It is an amenable number.

6497780 is an abundant number, since it is smaller than the sum of its proper divisors (7147600).

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

6497780 is a wasteful number, since it uses less digits than its factorization.

6497780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324898 (or 324896 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 6497780 is about 2549.0743417955. The cubic root of 6497780 is about 186.6043088196.

The spelling of 6497780 in words is "six million, four hundred ninety-seven thousand, seven hundred eighty".