1566670655 has 8 divisors (see below), whose sum is σ = 2050914384. Its totient is φ = 1139396800.

The previous prime is 1566670607. The next prime is 1566670657. The reversal of 1566670655 is 5560766651.

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

It is not a de Polignac number, because 1566670655 - 2²² = 1562476351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566670657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14242406 + ... + 14242515.

It is an arithmetic number, because the mean of its divisors is an integer number (256364298).

Almost surely, 2^1566670655 is an apocalyptic number.

1566670655 is a deficient number, since it is larger than the sum of its proper divisors (484243729).

1566670655 is a wasteful number, since it uses less digits than its factorization.

1566670655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28484937.

The product of its (nonzero) digits is 1134000, while the sum is 47.

The square root of 1566670655 is about 39581.1906718330. The cubic root of 1566670655 is about 1161.4287426526.

The spelling of 1566670655 in words is "one billion, five hundred sixty-six million, six hundred seventy thousand, six hundred fifty-five".