1401401566 has 32 divisors (see below), whose sum is σ = 2229599232. Its totient is φ = 659715840.

The previous prime is 1401401527. The next prime is 1401401627. The reversal of 1401401566 is 6651041041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383500 + ... + 387136.

It is an arithmetic number, because the mean of its divisors is an integer number (69674976).

Almost surely, 2^1401401566 is an apocalyptic number.

1401401566 is a deficient number, since it is larger than the sum of its proper divisors (828197666).

1401401566 is a wasteful number, since it uses less digits than its factorization.

1401401566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3844.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1401401566 is about 37435.2983960326. The cubic root of 1401401566 is about 1119.0621309988.

The spelling of 1401401566 in words is "one billion, four hundred one million, four hundred one thousand, five hundred sixty-six".