1661495284 has 12 divisors (see below), whose sum is σ = 2934292900. Its totient is φ = 823125888.

The previous prime is 1661495267. The next prime is 1661495291. The reversal of 1661495284 is 4825941661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1206867600 + 454627684 = 34740^2 + 21322^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1904949 + ... + 1905820.

Almost surely, 2^1661495284 is an apocalyptic number.

It is an amenable number.

1661495284 is a deficient number, since it is larger than the sum of its proper divisors (1272797616).

1661495284 is a wasteful number, since it uses less digits than its factorization.

1661495284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810882 (or 3810880 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 1661495284 is about 40761.4435956334. The cubic root of 1661495284 is about 1184.4035605777.

The spelling of 1661495284 in words is "one billion, six hundred sixty-one million, four hundred ninety-five thousand, two hundred eighty-four".