3666121516 has 24 divisors (see below), whose sum is σ = 6760152000. Its totient is φ = 1734843024.

The previous prime is 3666121493. The next prime is 3666121517. The reversal of 3666121516 is 6151216663.

It is not an unprimeable number, because it can be changed into a prime (3666121517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53775 + ... + 101113.

It is an arithmetic number, because the mean of its divisors is an integer number (281673000).

Almost surely, 2^3666121516 is an apocalyptic number.

It is an amenable number.

3666121516 is a deficient number, since it is larger than the sum of its proper divisors (3094030484).

3666121516 is a wasteful number, since it uses less digits than its factorization.

3666121516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48381 (or 48379 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 3666121516 is about 60548.5054811430. The cubic root of 3666121516 is about 1541.9452446543.

The spelling of 3666121516 in words is "three billion, six hundred sixty-six million, one hundred twenty-one thousand, five hundred sixteen".