61697761 has 8 divisors (see below), whose sum is σ = 64152000. Its totient is φ = 59265360.

The previous prime is 61697749. The next prime is 61697767. The reversal of 61697761 is 16779616.

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

It is a cyclic number.

It is not a de Polignac number, because 61697761 - 2⁵ = 61697729 is a prime.

It is a super-2 number, since 2×61697761² = 7613227424826242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61697767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 11116.

It is an arithmetic number, because the mean of its divisors is an integer number (8019000).

Almost surely, 2^61697761 is an apocalyptic number.

It is an amenable number.

61697761 is a deficient number, since it is larger than the sum of its proper divisors (2454239).

61697761 is a wasteful number, since it uses less digits than its factorization.

61697761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10919.

The product of its digits is 95256, while the sum is 43.

The square root of 61697761 is about 7854.7922314979. The cubic root of 61697761 is about 395.1449790942.

The spelling of 61697761 in words is "sixty-one million, six hundred ninety-seven thousand, seven hundred sixty-one".