1662926842 has 32 divisors (see below), whose sum is σ = 2663789328. Its totient is φ = 775873536.

The previous prime is 1662926807. The next prime is 1662926843. The reversal of 1662926842 is 2486292661.

It is a Cunningham number, because it is equal to 40779²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 93103201 + 1569823641 = 9649^2 + 39621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1662926792 and 1662926801.

It is not an unprimeable number, because it can be changed into a prime (1662926843) 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, 2985228 + ... + 2985784.

Almost surely, 2^1662926842 is an apocalyptic number.

1662926842 is a deficient number, since it is larger than the sum of its proper divisors (1000862486).

1662926842 is a wasteful number, since it uses less digits than its factorization.

1662926842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170.

The product of its digits is 497664, while the sum is 46.

The square root of 1662926842 is about 40779.0000122612. Note that the first 4 decimals coincide. The cubic root of 1662926842 is about 1184.7436268776.

The spelling of 1662926842 in words is "one billion, six hundred sixty-two million, nine hundred twenty-six thousand, eight hundred forty-two".