61613665 has 8 divisors (see below), whose sum is σ = 77151168. Its totient is φ = 47147760.

The previous prime is 61613653. The next prime is 61613677. The reversal of 61613665 is 56631616.

It is an interprime number because it is at equal distance from previous prime (61613653) and next prime (61613677).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61613665 - 2⁷ = 61613537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61613665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267771 + ... + 268000.

It is an arithmetic number, because the mean of its divisors is an integer number (9643896).

Almost surely, 2^61613665 is an apocalyptic number.

It is an amenable number.

61613665 is a deficient number, since it is larger than the sum of its proper divisors (15537503).

61613665 is a wasteful number, since it uses less digits than its factorization.

61613665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535799.

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

The square root of 61613665 is about 7849.4372409747. The cubic root of 61613665 is about 394.9653657610.

The spelling of 61613665 in words is "sixty-one million, six hundred thirteen thousand, six hundred sixty-five".