61366651 has 4 divisors (see below), whose sum is σ = 64976472. Its totient is φ = 57756832.

The previous prime is 61366601. The next prime is 61366661. The reversal of 61366651 is 15666316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61366651 - 2¹³ = 61358459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61366601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804885 + ... + 1804918.

It is an arithmetic number, because the mean of its divisors is an integer number (16244118).

Almost surely, 2^61366651 is an apocalyptic number.

61366651 is a deficient number, since it is larger than the sum of its proper divisors (3609821).

61366651 is a wasteful number, since it uses less digits than its factorization.

61366651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609820.

The product of its digits is 19440, while the sum is 34.

The square root of 61366651 is about 7833.6869352815. The cubic root of 61366651 is about 394.4368431577.

The spelling of 61366651 in words is "sixty-one million, three hundred sixty-six thousand, six hundred fifty-one".