361221660 has 48 divisors (see below), whose sum is σ = 1123802400. Its totient is φ = 96325632.

The previous prime is 361221617. The next prime is 361221677. The reversal of 361221660 is 66122163.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 333925 + ... + 335004.

It is an arithmetic number, because the mean of its divisors is an integer number (23412550).

Almost surely, 2^361221660 is an apocalyptic number.

361221660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

361221660 is an abundant number, since it is smaller than the sum of its proper divisors (762580740).

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

361221660 is a wasteful number, since it uses less digits than its factorization.

361221660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668947 (or 668939 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 361221660 is about 19005.8322627556. The cubic root of 361221660 is about 712.1824402027.

The spelling of 361221660 in words is "three hundred sixty-one million, two hundred twenty-one thousand, six hundred sixty".