1667451648 has 36 divisors (see below), whose sum is σ = 4437855128. Its totient is φ = 555816960.

The previous prime is 1667451641. The next prime is 1667451649. The reversal of 1667451648 is 8461547661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1667451597 and 1667451606.

It is not an unprimeable number, because it can be changed into a prime (1667451641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084813 + ... + 1086348.

Almost surely, 2^1667451648 is an apocalyptic number.

It is an amenable number.

1667451648 is an abundant number, since it is smaller than the sum of its proper divisors (2770403480).

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

1667451648 is an equidigital number, since it uses as much as digits as its factorization.

1667451648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171180 (or 2171166 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 1667451648 is about 40834.4419332504. The cubic root of 1667451648 is about 1185.8172119377.

The spelling of 1667451648 in words is "one billion, six hundred sixty-seven million, four hundred fifty-one thousand, six hundred forty-eight".