660161437 has 16 divisors (see below), whose sum is σ = 731468080. Its totient is φ = 591846912.

The previous prime is 660161417. The next prime is 660161471. The reversal of 660161437 is 734161066.

It can be written as a sum of positive squares in 8 ways, for example, as 4084441 + 656076996 = 2021^2 + 25614^2 .

It is a cyclic number.

It is not a de Polignac number, because 660161437 - 2²⁷ = 525943709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660161417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409489 + ... + 411097.

It is an arithmetic number, because the mean of its divisors is an integer number (45716755).

Almost surely, 2^660161437 is an apocalyptic number.

It is an amenable number.

660161437 is a deficient number, since it is larger than the sum of its proper divisors (71306643).

660161437 is a wasteful number, since it uses less digits than its factorization.

660161437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 660161437 is about 25693.6069285727. The cubic root of 660161437 is about 870.7297514816.

The spelling of 660161437 in words is "six hundred sixty million, one hundred sixty-one thousand, four hundred thirty-seven".