1661952984 has 32 divisors (see below), whose sum is σ = 4186607040. Its totient is φ = 549754400.

The previous prime is 1661952979. The next prime is 1661953043. The reversal of 1661952984 is 4892591661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261162 + ... + 267449.

It is an arithmetic number, because the mean of its divisors is an integer number (130831470).

Almost surely, 2^1661952984 is an apocalyptic number.

It is an amenable number.

1661952984 is an abundant number, since it is smaller than the sum of its proper divisors (2524654056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661952984 is a wasteful number, since it uses less digits than its factorization.

1661952984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528751 (or 528747 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 1661952984 is about 40767.0575832988. The cubic root of 1661952984 is about 1184.5123083513.

The spelling of 1661952984 in words is "one billion, six hundred sixty-one million, nine hundred fifty-two thousand, nine hundred eighty-four".