61766351 has 2 divisors, whose sum is σ = 61766352. Its totient is φ = 61766350.

The previous prime is 61766273. The next prime is 61766381. The reversal of 61766351 is 15366716.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61766351 - 2¹⁸ = 61504207 is a prime.

It is equal to p_3660578 and since 61766351 and 3660578 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61766381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30883175 + 30883176.

It is an arithmetic number, because the mean of its divisors is an integer number (30883176).

Almost surely, 2^61766351 is an apocalyptic number.

61766351 is a deficient number, since it is larger than the sum of its proper divisors (1).

61766351 is an equidigital number, since it uses as much as digits as its factorization.

61766351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 61766351 is about 7859.1571431038. The cubic root of 61766351 is about 395.2913537023.

The spelling of 61766351 in words is "sixty-one million, seven hundred sixty-six thousand, three hundred fifty-one".