1662466380 has 48 divisors (see below), whose sum is σ = 4928726880. Its totient is φ = 417246208.

The previous prime is 1662466369. The next prime is 1662466391. The reversal of 1662466380 is 836642661.

It is an interprime number because it is at equal distance from previous prime (1662466369) and next prime (1662466391).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813915 + ... + 815954.

It is an arithmetic number, because the mean of its divisors is an integer number (102681810).

Almost surely, 2^1662466380 is an apocalyptic number.

1662466380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662466380 is an abundant number, since it is smaller than the sum of its proper divisors (3266260500).

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

1662466380 is a wasteful number, since it uses less digits than its factorization.

1662466380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629898 (or 1629896 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 1662466380 is about 40773.3537987740. The cubic root of 1662466380 is about 1184.6342655263.

The spelling of 1662466380 in words is "one billion, six hundred sixty-two million, four hundred sixty-six thousand, three hundred eighty".