1006556551 has 16 divisors (see below), whose sum is σ = 1351461888. Its totient is φ = 723996000.

The previous prime is 1006556533. The next prime is 1006556557. The reversal of 1006556551 is 1556556001.

It is not a de Polignac number, because 1006556551 - 2¹⁵ = 1006523783 is a prime.

It is a super-2 number, since 2×1006556551² = 2026312180722031202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006556557) 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, 501775 + ... + 503776.

It is an arithmetic number, because the mean of its divisors is an integer number (84466368).

Almost surely, 2^1006556551 is an apocalyptic number.

1006556551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1006556551 is a deficient number, since it is larger than the sum of its proper divisors (344905337).

1006556551 is a wasteful number, since it uses less digits than its factorization.

1006556551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005582.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 1006556551 is about 31726.2754038352. The cubic root of 1006556551 is about 1002.1807578382.

The spelling of 1006556551 in words is "one billion, six million, five hundred fifty-six thousand, five hundred fifty-one".