1401166563 has 4 divisors (see below), whose sum is σ = 1868222088. Its totient is φ = 934111040.

The previous prime is 1401166549. The next prime is 1401166583. The reversal of 1401166563 is 3656611041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1401166563 - 2⁵ = 1401166531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1401166583) 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, 233527758 + ... + 233527763.

It is an arithmetic number, because the mean of its divisors is an integer number (467055522).

Almost surely, 2^1401166563 is an apocalyptic number.

1401166563 is a deficient number, since it is larger than the sum of its proper divisors (467055525).

1401166563 is an equidigital number, since it uses as much as digits as its factorization.

1401166563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467055524.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1401166563 is about 37432.1594755098. The cubic root of 1401166563 is about 1118.9995751343. Note that the first 3 decimals are identical.

The spelling of 1401166563 in words is "one billion, four hundred one million, one hundred sixty-six thousand, five hundred sixty-three".