6601766490 has 80 divisors (see below), whose sum is σ = 19365207840. Its totient is φ = 1600426080.

The previous prime is 6601766489. The next prime is 6601766531. The reversal of 6601766490 is 946671066.

It is a happy number.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 361560 + ... + 379379.

It is an arithmetic number, because the mean of its divisors is an integer number (242065098).

Almost surely, 2^6601766490 is an apocalyptic number.

6601766490 is an abundant number, since it is smaller than the sum of its proper divisors (12763441350).

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

6601766490 is a wasteful number, since it uses less digits than its factorization.

6601766490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740969 (or 740960 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 6601766490 is about 81251.2553133796. The cubic root of 6601766490 is about 1875.9447910506.

It can be divided in two parts, 660176 and 6490, that added together give a palindrome (666666).

The spelling of 6601766490 in words is "six billion, six hundred one million, seven hundred sixty-six thousand, four hundred ninety".