36661901 has 2 divisors, whose sum is σ = 36661902. Its totient is φ = 36661900.

The previous prime is 36661879. The next prime is 36661903. The reversal of 36661901 is 10916663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30261001 + 6400900 = 5501^2 + 2530^2 .

It is an emirp because it is prime and its reverse (10916663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36661901 - 2⁶ = 36661837 is a prime.

Together with 36661903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36661903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18330950 + 18330951.

It is an arithmetic number, because the mean of its divisors is an integer number (18330951).

Almost surely, 2^36661901 is an apocalyptic number.

It is an amenable number.

36661901 is a deficient number, since it is larger than the sum of its proper divisors (1).

36661901 is an equidigital number, since it uses as much as digits as its factorization.

36661901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 36661901 is about 6054.9071834339. The cubic root of 36661901 is about 332.2041040658.

The spelling of 36661901 in words is "thirty-six million, six hundred sixty-one thousand, nine hundred one".