660957401 has 8 divisors (see below), whose sum is σ = 712342344. Its totient is φ = 609649920.

The previous prime is 660957383. The next prime is 660957419. The reversal of 660957401 is 104759066.

It is an interprime number because it is at equal distance from previous prime (660957383) and next prime (660957419).

It can be written as a sum of positive squares in 4 ways, for example, as 10758400 + 650199001 = 3280^2 + 25499^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 660957401 - 2⁶ = 660957337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660957461) 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, 986 + ... + 36371.

It is an arithmetic number, because the mean of its divisors is an integer number (89042793).

Almost surely, 2^660957401 is an apocalyptic number.

It is an amenable number.

660957401 is a deficient number, since it is larger than the sum of its proper divisors (51384943).

660957401 is a wasteful number, since it uses less digits than its factorization.

660957401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38731.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 660957401 is about 25709.0917964832. The cubic root of 660957401 is about 871.0795604507.

The spelling of 660957401 in words is "six hundred sixty million, nine hundred fifty-seven thousand, four hundred one".