37370666666621 has 2 divisors, whose sum is σ = 37370666666622. Its totient is φ = 37370666666620.

The previous prime is 37370666666603. The next prime is 37370666666681. The reversal of 37370666666621 is 12666666607373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36141198180025 + 1229468486596 = 6011755^2 + 1108814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37370666666621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37370666666681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18685333333310 + 18685333333311.

It is an arithmetic number, because the mean of its divisors is an integer number (18685333333311).

Almost surely, 2^{37370666666621} is an apocalyptic number.

It is an amenable number.

37370666666621 is a deficient number, since it is larger than the sum of its proper divisors (1).

37370666666621 is an equidigital number, since it uses as much as digits as its factorization.

37370666666621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246903552, while the sum is 65.

The spelling of 37370666666621 in words is "thirty-seven trillion, three hundred seventy billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred twenty-one".