121671660 has 48 divisors (see below), whose sum is σ = 371653632. Its totient is φ = 29496000.

The previous prime is 121671653. The next prime is 121671677. The reversal of 121671660 is 66176121.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 91516 + ... + 92835.

It is an arithmetic number, because the mean of its divisors is an integer number (7742784).

Almost surely, 2^121671660 is an apocalyptic number.

121671660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121671660 is an abundant number, since it is smaller than the sum of its proper divisors (249981972).

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

121671660 is a wasteful number, since it uses less digits than its factorization.

121671660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184374 (or 184372 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 121671660 is about 11030.4877498685. The cubic root of 121671660 is about 495.5222322331.

The spelling of 121671660 in words is "one hundred twenty-one million, six hundred seventy-one thousand, six hundred sixty".