1231662660 has 48 divisors (see below), whose sum is σ = 3541868736. Its totient is φ = 319565952.

The previous prime is 1231662659. The next prime is 1231662661. The reversal of 1231662660 is 662661321.

It is an interprime number because it is at equal distance from previous prime (1231662659) and next prime (1231662661).

It is not an unprimeable number, because it can be changed into a prime (1231662661) 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, 275182 + ... + 279621.

It is an arithmetic number, because the mean of its divisors is an integer number (73788932).

Almost surely, 2^1231662660 is an apocalyptic number.

1231662660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231662660 is an abundant number, since it is smaller than the sum of its proper divisors (2310206076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231662660 is a wasteful number, since it uses less digits than its factorization.

1231662660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554852 (or 554850 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1231662660 is about 35095.0517879658. The cubic root of 1231662660 is about 1071.9238280788.

The spelling of 1231662660 in words is "one billion, two hundred thirty-one million, six hundred sixty-two thousand, six hundred sixty".