1421166655 has 16 divisors (see below), whose sum is σ = 1798963200. Its totient is φ = 1074811680.

The previous prime is 1421166631. The next prime is 1421166661. The reversal of 1421166655 is 5566611241.

It is not a de Polignac number, because 1421166655 - 2⁹ = 1421166143 is a prime.

It is a super-2 number, since 2×1421166655² = 4039429322567778050, which contains 22 as substring.

It is a congruent number.

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, 29890 + ... + 61120.

It is an arithmetic number, because the mean of its divisors is an integer number (112435200).

Almost surely, 2^1421166655 is an apocalyptic number.

1421166655 is a deficient number, since it is larger than the sum of its proper divisors (377796545).

1421166655 is a wasteful number, since it uses less digits than its factorization.

1421166655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31734.

The product of its digits is 43200, while the sum is 37.

The square root of 1421166655 is about 37698.3640891750. The cubic root of 1421166655 is about 1124.2985994986.

Adding to 1421166655 its reverse (5566611241), we get a palindrome (6987777896).

The spelling of 1421166655 in words is "one billion, four hundred twenty-one million, one hundred sixty-six thousand, six hundred fifty-five".