1487906661 has 16 divisors (see below), whose sum is σ = 1996554560. Its totient is φ = 985616640.

The previous prime is 1487906633. The next prime is 1487906669. The reversal of 1487906661 is 1666097841.

It is a happy number.

It is not a de Polignac number, because 1487906661 - 2¹³ = 1487898469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1487906661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487906669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390381 + ... + 394173.

It is an arithmetic number, because the mean of its divisors is an integer number (124784660).

Almost surely, 2^1487906661 is an apocalyptic number.

It is an amenable number.

1487906661 is a deficient number, since it is larger than the sum of its proper divisors (508647899).

1487906661 is a wasteful number, since it uses less digits than its factorization.

1487906661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1487906661 is about 38573.3931745705. The cubic root of 1487906661 is about 1141.6296230319.

The spelling of 1487906661 in words is "one billion, four hundred eighty-seven million, nine hundred six thousand, six hundred sixty-one".