1661460253 has 4 divisors (see below), whose sum is σ = 1662975900. Its totient is φ = 1659944608.

The previous prime is 1661460211. The next prime is 1661460259. The reversal of 1661460253 is 3520641661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1131447769 + 530012484 = 33637^2 + 23022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1661460253 - 2²⁹ = 1124589341 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 (1661460259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756178 + ... + 758371.

It is an arithmetic number, because the mean of its divisors is an integer number (415743975).

Almost surely, 2^1661460253 is an apocalyptic number.

It is an amenable number.

1661460253 is a deficient number, since it is larger than the sum of its proper divisors (1515647).

1661460253 is a wasteful number, since it uses less digits than its factorization.

1661460253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515646.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1661460253 is about 40761.0138858199. The cubic root of 1661460253 is about 1184.3952365230.

It can be divided in two parts, 16614 and 60253, that added together give a palindrome (76867).

The spelling of 1661460253 in words is "one billion, six hundred sixty-one million, four hundred sixty thousand, two hundred fifty-three".