1401066646 has 8 divisors (see below), whose sum is σ = 2401828560. Its totient is φ = 600457128.

The previous prime is 1401066629. The next prime is 1401066649. The reversal of 1401066646 is 6466601041.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401066649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50038081 + ... + 50038108.

It is an arithmetic number, because the mean of its divisors is an integer number (300228570).

Almost surely, 2^1401066646 is an apocalyptic number.

1401066646 is a deficient number, since it is larger than the sum of its proper divisors (1000761914).

1401066646 is a wasteful number, since it uses less digits than its factorization.

1401066646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100076198.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1401066646 is about 37430.8248105756. The cubic root of 1401066646 is about 1118.9729759321.

Adding to 1401066646 its reverse (6466601041), we get a palindrome (7867667687).

It can be divided in two parts, 14010 and 66646, that added together give a square (80656 = 284²).

The spelling of 1401066646 in words is "one billion, four hundred one million, sixty-six thousand, six hundred forty-six".