1665747364 has 6 divisors (see below), whose sum is σ = 2915057894. Its totient is φ = 832873680.

The previous prime is 1665747353. The next prime is 1665747371. The reversal of 1665747364 is 4637475661.

It can be written as a sum of positive squares in only one way, i.e., 1517102500 + 148644864 = 38950^2 + 12192^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208218417 + ... + 208218424.

Almost surely, 2^1665747364 is an apocalyptic number.

It is an amenable number.

1665747364 is a deficient number, since it is larger than the sum of its proper divisors (1249310530).

1665747364 is a wasteful number, since it uses less digits than its factorization.

1665747364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416436845 (or 416436843 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 49.

The square root of 1665747364 is about 40813.5683811156. The cubic root of 1665747364 is about 1185.4130706378.

The spelling of 1665747364 in words is "one billion, six hundred sixty-five million, seven hundred forty-seven thousand, three hundred sixty-four".