3666021537 has 8 divisors (see below), whose sum is σ = 4888391904. Its totient is φ = 2443832768.

The previous prime is 3666021533. The next prime is 3666021551. The reversal of 3666021537 is 7351206663.

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 3666021537 - 2² = 3666021533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3666021495 and 3666021504.

It is not an unprimeable number, because it can be changed into a prime (3666021533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12118 + ... + 86480.

It is an arithmetic number, because the mean of its divisors is an integer number (611048988).

Almost surely, 2^3666021537 is an apocalyptic number.

It is an amenable number.

3666021537 is a deficient number, since it is larger than the sum of its proper divisors (1222370367).

3666021537 is a wasteful number, since it uses less digits than its factorization.

3666021537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90799.

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 3666021537 is about 60547.6798647149. The cubic root of 3666021537 is about 1541.9312277026.

The spelling of 3666021537 in words is "three billion, six hundred sixty-six million, twenty-one thousand, five hundred thirty-seven".