1066387806 has 48 divisors (see below), whose sum is σ = 2653223040. Its totient is φ = 306138960.

The previous prime is 1066387799. The next prime is 1066387811. The reversal of 1066387806 is 6087836601.

1066387806 is a `hidden beast` number, since 1 + 0 + 6 + 638 + 7 + 8 + 0 + 6 = 666.

It is a super-2 number, since 2×1066387806² = 2274365905570987272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137970 + ... + 145493.

It is an arithmetic number, because the mean of its divisors is an integer number (55275480).

Almost surely, 2^1066387806 is an apocalyptic number.

1066387806 is an abundant number, since it is smaller than the sum of its proper divisors (1586835234).

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

1066387806 is a wasteful number, since it uses less digits than its factorization.

1066387806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283501 (or 283498 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1066387806 is about 32655.5937934070. The cubic root of 1066387806 is about 1021.6568631147.

The spelling of 1066387806 in words is "one billion, sixty-six million, three hundred eighty-seven thousand, eight hundred six".