37665522021 has 8 divisors (see below), whose sum is σ = 50259125664. Its totient is φ = 25091133200.

The previous prime is 37665522019. The next prime is 37665522077. The reversal of 37665522021 is 12022556673.

It is a happy number.

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 37665522021 - 2¹ = 37665522019 is a prime.

It is a super-2 number, since 2×37665522021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37665522121) 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, 4799130 + ... + 4806971.

It is an arithmetic number, because the mean of its divisors is an integer number (6282390708).

Almost surely, 2^37665522021 is an apocalyptic number.

It is an amenable number.

37665522021 is a deficient number, since it is larger than the sum of its proper divisors (12593603643).

37665522021 is a wasteful number, since it uses less digits than its factorization.

37665522021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9607411.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 37665522021 in words is "thirty-seven billion, six hundred sixty-five million, five hundred twenty-two thousand, twenty-one".