1661130435 has 32 divisors (see below), whose sum is σ = 2835689472. Its totient is φ = 827440640.

The previous prime is 1661130389. The next prime is 1661130437. The reversal of 1661130435 is 5340311661.

It is not a de Polignac number, because 1661130435 - 2⁶ = 1661130371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1661130437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8542 + ... + 58268.

It is an arithmetic number, because the mean of its divisors is an integer number (88615296).

Almost surely, 2^1661130435 is an apocalyptic number.

1661130435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1661130435 is a deficient number, since it is larger than the sum of its proper divisors (1174559037).

1661130435 is a wasteful number, since it uses less digits than its factorization.

1661130435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49883.

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

The square root of 1661130435 is about 40756.9679318764. The cubic root of 1661130435 is about 1184.3168595413.

The spelling of 1661130435 in words is "one billion, six hundred sixty-one million, one hundred thirty thousand, four hundred thirty-five".