6651501551 has 16 divisors (see below), whose sum is σ = 7125148800. Its totient is φ = 6191172000.

The previous prime is 6651501541. The next prime is 6651501613. The reversal of 6651501551 is 1551051566.

It is a cyclic number.

It is not a de Polignac number, because 6651501551 - 2³⁰ = 5577759727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651501541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238160 + ... + 264618.

It is an arithmetic number, because the mean of its divisors is an integer number (445321800).

Almost surely, 2^6651501551 is an apocalyptic number.

6651501551 is a deficient number, since it is larger than the sum of its proper divisors (473647249).

6651501551 is a wasteful number, since it uses less digits than its factorization.

6651501551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26710.

The product of its (nonzero) digits is 22500, while the sum is 35.

The square root of 6651501551 is about 81556.7382317366. The cubic root of 6651501551 is about 1880.6438822692.

The spelling of 6651501551 in words is "six billion, six hundred fifty-one million, five hundred one thousand, five hundred fifty-one".