660253401 has 24 divisors (see below), whose sum is σ = 1005956640. Its totient is φ = 416145600.

The previous prime is 660253397. The next prime is 660253417. The reversal of 660253401 is 104352066.

660253401 is a `hidden beast` number, since 6 + 6 + 0 + 253 + 401 = 666.

It is not a de Polignac number, because 660253401 - 2² = 660253397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660253421) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 85386 + ... + 92796.

It is an arithmetic number, because the mean of its divisors is an integer number (41914860).

Almost surely, 2^660253401 is an apocalyptic number.

It is an amenable number.

660253401 is a deficient number, since it is larger than the sum of its proper divisors (345703239).

660253401 is a wasteful number, since it uses less digits than its factorization.

660253401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7957 (or 7954 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 660253401 is about 25695.3964943139. The cubic root of 660253401 is about 870.7701820330.

The spelling of 660253401 in words is "six hundred sixty million, two hundred fifty-three thousand, four hundred one".