661501353 has 8 divisors (see below), whose sum is σ = 883814848. Its totient is φ = 440094384.

The previous prime is 661501319. The next prime is 661501361. The reversal of 661501353 is 353105166.

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

It is not a de Polignac number, because 661501353 - 2⁶ = 661501289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 661501353.

It is not an unprimeable number, because it can be changed into a prime (661501363) 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, 224926 + ... + 227847.

It is an arithmetic number, because the mean of its divisors is an integer number (110476856).

Almost surely, 2^661501353 is an apocalyptic number.

It is an amenable number.

661501353 is a deficient number, since it is larger than the sum of its proper divisors (222313495).

661501353 is a wasteful number, since it uses less digits than its factorization.

661501353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453263.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 661501353 is about 25719.6686020641. The cubic root of 661501353 is about 871.3184540846.

The spelling of 661501353 in words is "six hundred sixty-one million, five hundred one thousand, three hundred fifty-three".