1662909956 has 6 divisors (see below), whose sum is σ = 2910092430. Its totient is φ = 831454976.

The previous prime is 1662909943. The next prime is 1662909991. The reversal of 1662909956 is 6599092661.

It can be written as a sum of positive squares in only one way, i.e., 1019780356 + 643129600 = 31934^2 + 25360^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1662909898 and 1662909907.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207863741 + ... + 207863748.

It is an arithmetic number, because the mean of its divisors is an integer number (485015405).

Almost surely, 2^1662909956 is an apocalyptic number.

It is an amenable number.

1662909956 is a deficient number, since it is larger than the sum of its proper divisors (1247182474).

1662909956 is a wasteful number, since it uses less digits than its factorization.

1662909956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415727493 (or 415727491 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 53.

The square root of 1662909956 is about 40778.7929688950. The cubic root of 1662909956 is about 1184.7396167496.

The spelling of 1662909956 in words is "one billion, six hundred sixty-two million, nine hundred nine thousand, nine hundred fifty-six".