6651552765 has 32 divisors (see below), whose sum is σ = 12503062656. Its totient is φ = 2976917760.

The previous prime is 6651552751. The next prime is 6651552799. The reversal of 6651552765 is 5672551566.

It is a happy number.

It is not a de Polignac number, because 6651552765 - 2⁴ = 6651552749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1548334 + ... + 1552623.

It is an arithmetic number, because the mean of its divisors is an integer number (390720708).

Almost surely, 2^6651552765 is an apocalyptic number.

6651552765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6651552765 is a deficient number, since it is larger than the sum of its proper divisors (5851509891).

6651552765 is a wasteful number, since it uses less digits than its factorization.

6651552765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100989.

The product of its digits is 1890000, while the sum is 48.

The square root of 6651552765 is about 81557.0522088679. The cubic root of 6651552765 is about 1880.6487090014.

The spelling of 6651552765 in words is "six billion, six hundred fifty-one million, five hundred fifty-two thousand, seven hundred sixty-five".