1006666551 has 12 divisors (see below), whose sum is σ = 1586262600. Its totient is φ = 610100880.

The previous prime is 1006666541. The next prime is 1006666559. The reversal of 1006666551 is 1556666001.

It is not a de Polignac number, because 1006666551 - 2¹⁵ = 1006633783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006666559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5084076 + ... + 5084273.

It is an arithmetic number, because the mean of its divisors is an integer number (132188550).

Almost surely, 2^1006666551 is an apocalyptic number.

1006666551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1006666551 is a deficient number, since it is larger than the sum of its proper divisors (579596049).

1006666551 is a wasteful number, since it uses less digits than its factorization.

1006666551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10168366 (or 10168363 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1006666551 is about 31728.0089353240. The cubic root of 1006666551 is about 1002.2172637745.

The spelling of 1006666551 in words is "one billion, six million, six hundred sixty-six thousand, five hundred fifty-one".