487780661 has 8 divisors (see below), whose sum is σ = 489760704. Its totient is φ = 485805600.

The previous prime is 487780637. The next prime is 487780663. The reversal of 487780661 is 166087784.

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 487780661 - 2¹⁸ = 487518517 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 (487780663) 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, 463586 + ... + 464636.

It is an arithmetic number, because the mean of its divisors is an integer number (61220088).

Almost surely, 2^487780661 is an apocalyptic number.

It is an amenable number.

487780661 is a deficient number, since it is larger than the sum of its proper divisors (1980043).

487780661 is a wasteful number, since it uses less digits than its factorization.

487780661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 487780661 is about 22085.7569714058. The cubic root of 487780661 is about 787.1814643871.

The spelling of 487780661 in words is "four hundred eighty-seven million, seven hundred eighty thousand, six hundred sixty-one".