3771666021 has 8 divisors (see below), whose sum is σ = 5202298080. Its totient is φ = 2427738992.

The previous prime is 3771666013. The next prime is 3771666043. The reversal of 3771666021 is 1206661773.

3771666021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3771666021 - 2³ = 3771666013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3771666001) 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, 21676155 + ... + 21676328.

It is an arithmetic number, because the mean of its divisors is an integer number (650287260).

Almost surely, 2^3771666021 is an apocalyptic number.

It is an amenable number.

3771666021 is a deficient number, since it is larger than the sum of its proper divisors (1430632059).

3771666021 is a wasteful number, since it uses less digits than its factorization.

3771666021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43352515.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 3771666021 is about 61413.8911077942. The cubic root of 3771666021 is about 1556.6025697408.

The spelling of 3771666021 in words is "three billion, seven hundred seventy-one million, six hundred sixty-six thousand, twenty-one".