660552401 has 8 divisors (see below), whose sum is σ = 683726400. Its totient is φ = 637404880.

The previous prime is 660552359. The next prime is 660552407. The reversal of 660552401 is 104255066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660552401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660552407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53546 + ... + 64716.

It is an arithmetic number, because the mean of its divisors is an integer number (85465800).

Almost surely, 2^660552401 is an apocalyptic number.

It is an amenable number.

660552401 is a deficient number, since it is larger than the sum of its proper divisors (23173999).

660552401 is a wasteful number, since it uses less digits than its factorization.

660552401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13239.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 660552401 is about 25701.2139985643. The cubic root of 660552401 is about 870.9016068223.

The spelling of 660552401 in words is "six hundred sixty million, five hundred fifty-two thousand, four hundred one".