1066645090 has 64 divisors (see below), whose sum is σ = 2221095168. Its totient is φ = 361267200.

The previous prime is 1066645067. The next prime is 1066645091. The reversal of 1066645090 is 905466601.

It is a super-2 number, since 2×1066645090² = 2275463496042216200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066645091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3795750 + ... + 3796030.

It is an arithmetic number, because the mean of its divisors is an integer number (34704612).

Almost surely, 2^1066645090 is an apocalyptic number.

1066645090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066645090 is an abundant number, since it is smaller than the sum of its proper divisors (1154450078).

1066645090 is a wasteful number, since it uses less digits than its factorization.

1066645090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1066645090 is about 32659.5329115405. The cubic root of 1066645090 is about 1021.7390204770.

The spelling of 1066645090 in words is "one billion, sixty-six million, six hundred forty-five thousand, ninety".