661546102 has 16 divisors (see below), whose sum is σ = 1183387392. Its totient is φ = 271192680.

The previous prime is 661546091. The next prime is 661546117. The reversal of 661546102 is 201645166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026924 + ... + 1027567.

It is an arithmetic number, because the mean of its divisors is an integer number (73961712).

Almost surely, 2^661546102 is an apocalyptic number.

661546102 is a deficient number, since it is larger than the sum of its proper divisors (521841290).

661546102 is a wasteful number, since it uses less digits than its factorization.

661546102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054523.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 661546102 is about 25720.5385246888. The cubic root of 661546102 is about 871.3381011849.

The spelling of 661546102 in words is "six hundred sixty-one million, five hundred forty-six thousand, one hundred two".