37666414421 has 2 divisors, whose sum is σ = 37666414422. Its totient is φ = 37666414420.

The previous prime is 37666414399. The next prime is 37666414453. The reversal of 37666414421 is 12441466673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36309302500 + 1357111921 = 190550^2 + 36839^2 .

It is a cyclic number.

It is not a de Polignac number, because 37666414421 - 2¹⁴ = 37666398037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37666410421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18833207210 + 18833207211.

It is an arithmetic number, because the mean of its divisors is an integer number (18833207211).

Almost surely, 2^37666414421 is an apocalyptic number.

It is an amenable number.

37666414421 is a deficient number, since it is larger than the sum of its proper divisors (1).

37666414421 is an equidigital number, since it uses as much as digits as its factorization.

37666414421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The spelling of 37666414421 in words is "thirty-seven billion, six hundred sixty-six million, four hundred fourteen thousand, four hundred twenty-one".