1661062642 has 8 divisors (see below), whose sum is σ = 2491848576. Its totient is φ = 830446452.

The previous prime is 1661062621. The next prime is 1661062681. The reversal of 1661062642 is 2462601661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1661062598 and 1661062607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14218 + ... + 59365.

It is an arithmetic number, because the mean of its divisors is an integer number (311481072).

Almost surely, 2^1661062642 is an apocalyptic number.

1661062642 is a deficient number, since it is larger than the sum of its proper divisors (830785934).

1661062642 is a wasteful number, since it uses less digits than its factorization.

1661062642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84872.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1661062642 is about 40756.1362496496. The cubic root of 1661062642 is about 1184.3007481264.

The spelling of 1661062642 in words is "one billion, six hundred sixty-one million, sixty-two thousand, six hundred forty-two".