61655207 has 2 divisors, whose sum is σ = 61655208. Its totient is φ = 61655206.

The previous prime is 61655197. The next prime is 61655317. The reversal of 61655207 is 70255616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61655207 - 2²⁰ = 60606631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61655707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30827603 + 30827604.

It is an arithmetic number, because the mean of its divisors is an integer number (30827604).

Almost surely, 2^61655207 is an apocalyptic number.

61655207 is a deficient number, since it is larger than the sum of its proper divisors (1).

61655207 is an equidigital number, since it uses as much as digits as its factorization.

61655207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 61655207 is about 7852.0829720527. The cubic root of 61655207 is about 395.0541121188.

The spelling of 61655207 in words is "sixty-one million, six hundred fifty-five thousand, two hundred seven".