61501667 has 2 divisors, whose sum is σ = 61501668. Its totient is φ = 61501666.

The previous prime is 61501639. The next prime is 61501669. The reversal of 61501667 is 76610516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61501667 - 2⁸ = 61501411 is a prime.

Together with 61501669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61501669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750833 + 30750834.

It is an arithmetic number, because the mean of its divisors is an integer number (30750834).

Almost surely, 2^61501667 is an apocalyptic number.

61501667 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501667 is an equidigital number, since it uses as much as digits as its factorization.

61501667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 61501667 is about 7842.2998539969. The cubic root of 61501667 is about 394.7259050234.

The spelling of 61501667 in words is "sixty-one million, five hundred one thousand, six hundred sixty-seven".