1055666506 has 8 divisors (see below), whose sum is σ = 1586245860. Its totient is φ = 526917888.

The previous prime is 1055666503. The next prime is 1055666531. The reversal of 1055666506 is 6056665501.

It can be written as a sum of positive squares in 2 ways, for example, as 1000773225 + 54893281 = 31635^2 + 7409^2 .

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

It is a super-2 number, since 2×1055666506² = 2228863543780496072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055666501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456241 + ... + 458548.

Almost surely, 2^1055666506 is an apocalyptic number.

1055666506 is a deficient number, since it is larger than the sum of its proper divisors (530579354).

1055666506 is an equidigital number, since it uses as much as digits as its factorization.

1055666506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915368.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 1055666506 is about 32491.0219291422. The cubic root of 1055666506 is about 1018.2214636228.

The spelling of 1055666506 in words is "one billion, fifty-five million, six hundred sixty-six thousand, five hundred six".