1066605550 has 24 divisors (see below), whose sum is σ = 1995370056. Its totient is φ = 424172640.

The previous prime is 1066605539. The next prime is 1066605571. The reversal of 1066605550 is 555066601.

It is a super-2 number, since 2×1066605550² = 2275294798581605000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53004 + ... + 70303.

It is an arithmetic number, because the mean of its divisors is an integer number (83140419).

Almost surely, 2^1066605550 is an apocalyptic number.

1066605550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066605550 is a deficient number, since it is larger than the sum of its proper divisors (928764506).

1066605550 is a wasteful number, since it uses less digits than its factorization.

1066605550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123492 (or 123487 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1066605550 is about 32658.9275696554. The cubic root of 1066605550 is about 1021.7263952028.

The spelling of 1066605550 in words is "one billion, sixty-six million, six hundred five thousand, five hundred fifty".