1661430153 has 8 divisors (see below), whose sum is σ = 2221517088. Its totient is φ = 1104481664.

The previous prime is 1661430143. The next prime is 1661430157. The reversal of 1661430153 is 3510341661.

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 1661430153 - 2⁴ = 1661430137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1661430153.

It is not an unprimeable number, because it can be changed into a prime (1661430157) 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, 783375 + ... + 785492.

It is an arithmetic number, because the mean of its divisors is an integer number (277689636).

Almost surely, 2^1661430153 is an apocalyptic number.

It is an amenable number.

1661430153 is a deficient number, since it is larger than the sum of its proper divisors (560086935).

1661430153 is a wasteful number, since it uses less digits than its factorization.

1661430153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569223.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1661430153 is about 40760.6446587882. The cubic root of 1661430153 is about 1184.3880840775.

The spelling of 1661430153 in words is "one billion, six hundred sixty-one million, four hundred thirty thousand, one hundred fifty-three".