73661501 has 2 divisors, whose sum is σ = 73661502. Its totient is φ = 73661500.

The previous prime is 73661477. The next prime is 73661503. The reversal of 73661501 is 10516637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 900601 = 8530^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 73661501 - 2¹⁸ = 73399357 is a prime.

Together with 73661503, 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 (73661503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36830750 + 36830751.

It is an arithmetic number, because the mean of its divisors is an integer number (36830751).

Almost surely, 2^73661501 is an apocalyptic number.

It is an amenable number.

73661501 is a deficient number, since it is larger than the sum of its proper divisors (1).

73661501 is an equidigital number, since it uses as much as digits as its factorization.

73661501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 73661501 is about 8582.6278609759. The cubic root of 73661501 is about 419.1925169503.

The spelling of 73661501 in words is "seventy-three million, six hundred sixty-one thousand, five hundred one".