1066670705 has 8 divisors (see below), whose sum is σ = 1300988904. Its totient is φ = 839347200.

The previous prime is 1066670651. The next prime is 1066670741. The reversal of 1066670705 is 5070766601.

It can be written as a sum of positive squares in 4 ways, for example, as 47720464 + 1018950241 = 6908^2 + 31921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1066670705 - 2¹² = 1066666609 is a prime.

It is a super-2 number, since 2×1066670705² = 2275572785810394050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1748336 + ... + 1748945.

It is an arithmetic number, because the mean of its divisors is an integer number (162623613).

Almost surely, 2^1066670705 is an apocalyptic number.

It is an amenable number.

1066670705 is a deficient number, since it is larger than the sum of its proper divisors (234318199).

1066670705 is an equidigital number, since it uses as much as digits as its factorization.

1066670705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497347.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1066670705 is about 32659.9250611510. The cubic root of 1066670705 is about 1021.7471992785.

The spelling of 1066670705 in words is "one billion, sixty-six million, six hundred seventy thousand, seven hundred five".