133570666 has 32 divisors (see below), whose sum is σ = 220507920. Its totient is φ = 60420096.

The previous prime is 133570651. The next prime is 133570673. The reversal of 133570666 is 666075331.

It can be written as a sum of positive squares in 8 ways, for example, as 94770225 + 38800441 = 9735^2 + 6229^2 .

It is a super-2 number, since 2×133570666² = 35682245631367112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111366 + ... + 112558.

Almost surely, 2^133570666 is an apocalyptic number.

133570666 is a deficient number, since it is larger than the sum of its proper divisors (86937254).

133570666 is a wasteful number, since it uses less digits than its factorization.

133570666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 133570666 is about 11557.2776206164. The cubic root of 133570666 is about 511.1758923595.

The spelling of 133570666 in words is "one hundred thirty-three million, five hundred seventy thousand, six hundred sixty-six".