3761661021 has 16 divisors (see below), whose sum is σ = 5461579200. Its totient is φ = 2293861248.

The previous prime is 3761660999. The next prime is 3761661037. The reversal of 3761661021 is 1201661673.

It is not a de Polignac number, because 3761661021 - 2⁶ = 3761660957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3761661041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136176 + ... + 1139481.

It is an arithmetic number, because the mean of its divisors is an integer number (341348700).

Almost surely, 2^3761661021 is an apocalyptic number.

It is an amenable number.

3761661021 is a deficient number, since it is larger than the sum of its proper divisors (1699918179).

3761661021 is a wasteful number, since it uses less digits than its factorization.

3761661021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275708.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 3761661021 is about 61332.3815043897. The cubic root of 3761661021 is about 1555.2249645747.

The spelling of 3761661021 in words is "three billion, seven hundred sixty-one million, six hundred sixty-one thousand, twenty-one".