1661262048 has 60 divisors (see below), whose sum is σ = 4885733160. Its totient is φ = 553753152.

The previous prime is 1661262023. The next prime is 1661262077. The reversal of 1661262048 is 8402621661.

1661262048 is a `hidden beast` number, since 16 + 6 + 12 + 620 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 317868 + ... + 323051.

It is an arithmetic number, because the mean of its divisors is an integer number (81428886).

Almost surely, 2^1661262048 is an apocalyptic number.

1661262048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1661262048 is an abundant number, since it is smaller than the sum of its proper divisors (3224471112).

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

1661262048 is an equidigital number, since it uses as much as digits as its factorization.

1661262048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640941 (or 640924 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1661262048 is about 40758.5825072462. The cubic root of 1661262048 is about 1184.3481369123.

The spelling of 1661262048 in words is "one billion, six hundred sixty-one million, two hundred sixty-two thousand, forty-eight".