1661030677 has 8 divisors (see below), whose sum is σ = 1709097272. Its totient is φ = 1613131200.

The previous prime is 1661030669. The next prime is 1661030681. The reversal of 1661030677 is 7760301661.

It can be written as a sum of positive squares in 4 ways, for example, as 350663076 + 1310367601 = 18726^2 + 36199^2 .

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 1661030677 - 2³ = 1661030669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661030687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21474 + ... + 61507.

It is an arithmetic number, because the mean of its divisors is an integer number (213637159).

Almost surely, 2^1661030677 is an apocalyptic number.

It is an amenable number.

1661030677 is a deficient number, since it is larger than the sum of its proper divisors (48066595).

1661030677 is an equidigital number, since it uses as much as digits as its factorization.

1661030677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83559.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 1661030677 is about 40755.7440982250. The cubic root of 1661030677 is about 1184.2931512995.

The spelling of 1661030677 in words is "one billion, six hundred sixty-one million, thirty thousand, six hundred seventy-seven".