1662506631 has 24 divisors (see below), whose sum is σ = 2637697920. Its totient is φ = 1004349456.

The previous prime is 1662506611. The next prime is 1662506639. The reversal of 1662506631 is 1366052661.

1662506631 is a `hidden beast` number, since 16 + 6 + 2 + 5 + 0 + 6 + 631 = 666.

It is not a de Polignac number, because 1662506631 - 2⁶ = 1662506567 is a prime.

It is a super-2 number, since 2×1662506631² = 5527856596237940322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662506639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207421 + ... + 215286.

It is an arithmetic number, because the mean of its divisors is an integer number (109904080).

Almost surely, 2^1662506631 is an apocalyptic number.

1662506631 is a deficient number, since it is larger than the sum of its proper divisors (975191289).

1662506631 is a wasteful number, since it uses less digits than its factorization.

1662506631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422755 (or 422752 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1662506631 is about 40773.8473902083. The cubic root of 1662506631 is about 1184.6438260864.

The spelling of 1662506631 in words is "one billion, six hundred sixty-two million, five hundred six thousand, six hundred thirty-one".