1661774476 has 24 divisors (see below), whose sum is σ = 2923025616. Its totient is φ = 826636800.

The previous prime is 1661774473. The next prime is 1661774483. The reversal of 1661774476 is 6744771661.

It is a super-2 number, since 2×1661774476² = 5522988818170149152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1661774473) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 731895 + ... + 734161.

It is an arithmetic number, because the mean of its divisors is an integer number (121792734).

Almost surely, 2^1661774476 is an apocalyptic number.

It is an amenable number.

1661774476 is a deficient number, since it is larger than the sum of its proper divisors (1261251140).

1661774476 is a wasteful number, since it uses less digits than its factorization.

1661774476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129 (or 3127 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 49.

The square root of 1661774476 is about 40764.8681587467. The cubic root of 1661774476 is about 1184.4698979068.

The spelling of 1661774476 in words is "one billion, six hundred sixty-one million, seven hundred seventy-four thousand, four hundred seventy-six".