1401666375 has 32 divisors (see below), whose sum is σ = 2395433664. Its totient is φ = 727344000.

The previous prime is 1401666373. The next prime is 1401666377. The reversal of 1401666375 is 5736661041.

It is an interprime number because it is at equal distance from previous prime (1401666373) and next prime (1401666377).

It is not a de Polignac number, because 1401666375 - 2¹ = 1401666373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401666373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36636 + ... + 64385.

It is an arithmetic number, because the mean of its divisors is an integer number (74857302).

Almost surely, 2^1401666375 is an apocalyptic number.

1401666375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1401666375 is a deficient number, since it is larger than the sum of its proper divisors (993767289).

1401666375 is a wasteful number, since it uses less digits than its factorization.

1401666375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101076 (or 101066 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1401666375 is about 37438.8351180963. The cubic root of 1401666375 is about 1119.1326125956.

It can be divided in two parts, 1401666 and 375, that added together give a palindrome (1402041).

The spelling of 1401666375 in words is "one billion, four hundred one million, six hundred sixty-six thousand, three hundred seventy-five".