1667264820 has 96 divisors (see below), whose sum is σ = 5292094080. Its totient is φ = 388800000.

The previous prime is 1667264791. The next prime is 1667264821. The reversal of 1667264820 is 284627661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667264821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41431 + ... + 71070.

It is an arithmetic number, because the mean of its divisors is an integer number (55125980).

Almost surely, 2^1667264820 is an apocalyptic number.

1667264820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667264820 is an abundant number, since it is smaller than the sum of its proper divisors (3624829260).

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

1667264820 is a wasteful number, since it uses less digits than its factorization.

1667264820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112545 (or 112543 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1667264820 is about 40832.1542414798. The cubic root of 1667264820 is about 1185.7729223710.

The spelling of 1667264820 in words is "one billion, six hundred sixty-seven million, two hundred sixty-four thousand, eight hundred twenty".