1066152780 has 648 divisors, whose sum is σ = 4404136464. Its totient is φ = 215550720.

The previous prime is 1066152751. The next prime is 1066152797. The reversal of 1066152780 is 872516601.

1066152780 is a `hidden beast` number, since 10 + 6 + 615 + 27 + 8 + 0 = 666.

It is a super-2 number, since 2×1066152780² = 2273363500603456800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 28814922 + ... + 28814958.

Almost surely, 2^1066152780 is an apocalyptic number.

1066152780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066152780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2202068232).

1066152780 is an abundant number, since it is smaller than the sum of its proper divisors (3337983684).

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

1066152780 is a wasteful number, since it uses less digits than its factorization.

1066152780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1066152780 is about 32651.9950385884. The cubic root of 1066152780 is about 1021.5818017513.

The spelling of 1066152780 in words is "one billion, sixty-six million, one hundred fifty-two thousand, seven hundred eighty".