1066650660 has 48 divisors (see below), whose sum is σ = 3318470400. Its totient is φ = 284440032.

The previous prime is 1066650659. The next prime is 1066650661. The reversal of 1066650660 is 660566601.

It is an interprime number because it is at equal distance from previous prime (1066650659) and next prime (1066650661).

It is a super-2 number, since 2×1066650660² = 2275487260956871200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1066650661) 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, 987100 + ... + 988179.

It is an arithmetic number, because the mean of its divisors is an integer number (69134800).

Almost surely, 2^1066650660 is an apocalyptic number.

1066650660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066650660 is an abundant number, since it is smaller than the sum of its proper divisors (2251819740).

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

1066650660 is a wasteful number, since it uses less digits than its factorization.

1066650660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975297 (or 1975289 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1066650660 is about 32659.6181851534. The cubic root of 1066650660 is about 1021.7407989743.

The spelling of 1066650660 in words is "one billion, sixty-six million, six hundred fifty thousand, six hundred sixty".