1668077280 has 96 divisors (see below), whose sum is σ = 5838285600. Its totient is φ = 444819456.

The previous prime is 1668077273. The next prime is 1668077287. The reversal of 1668077280 is 827708661.

1668077280 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1668077273) and next prime (1668077287).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668077287) 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, 188745 + ... + 197384.

It is an arithmetic number, because the mean of its divisors is an integer number (60815475).

Almost surely, 2^1668077280 is an apocalyptic number.

1668077280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668077280 is an abundant number, since it is smaller than the sum of its proper divisors (4170208320).

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

1668077280 is a wasteful number, since it uses less digits than its factorization.

1668077280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386153 (or 386139 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 1668077280 is about 40842.1018068365. The cubic root of 1668077280 is about 1185.9655005809.

The spelling of 1668077280 in words is "one billion, six hundred sixty-eight million, seventy-seven thousand, two hundred eighty".