661202146 has 16 divisors (see below), whose sum is σ = 1119277440. Its totient is φ = 290182480.

The previous prime is 661202123. The next prime is 661202159. The reversal of 661202146 is 641202166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517546 + ... + 518821.

It is an arithmetic number, because the mean of its divisors is an integer number (69954840).

Almost surely, 2^661202146 is an apocalyptic number.

661202146 is a deficient number, since it is larger than the sum of its proper divisors (458075294).

661202146 is a wasteful number, since it uses less digits than its factorization.

661202146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036409.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 661202146 is about 25713.8512479169. The cubic root of 661202146 is about 871.1870641304.

The spelling of 661202146 in words is "six hundred sixty-one million, two hundred two thousand, one hundred forty-six".