1661264422 has 16 divisors (see below), whose sum is σ = 2545084080. Its totient is φ = 813087072.

The previous prime is 1661264399. The next prime is 1661264441. The reversal of 1661264422 is 2244621661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27813 + ... + 64000.

It is an arithmetic number, because the mean of its divisors is an integer number (159067755).

Almost surely, 2^1661264422 is an apocalyptic number.

1661264422 is a deficient number, since it is larger than the sum of its proper divisors (883819658).

1661264422 is a wasteful number, since it uses less digits than its factorization.

1661264422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92007.

The product of its digits is 27648, while the sum is 34.

The square root of 1661264422 is about 40758.6116299366. The cubic root of 1661264422 is about 1184.3487010699.

The spelling of 1661264422 in words is "one billion, six hundred sixty-one million, two hundred sixty-four thousand, four hundred twenty-two".