720061761 has 8 divisors (see below), whose sum is σ = 980509824. Its totient is φ = 469827440.

The previous prime is 720061733. The next prime is 720061781. The reversal of 720061761 is 167160027.

It is a happy number.

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 720061761 - 2⁷ = 720061633 is a prime.

It is a super-2 number, since 2×720061761² = 1036977879308842242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720061711) 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, 2553270 + ... + 2553551.

It is an arithmetic number, because the mean of its divisors is an integer number (122563728).

Almost surely, 2^720061761 is an apocalyptic number.

It is an amenable number.

720061761 is a deficient number, since it is larger than the sum of its proper divisors (260448063).

720061761 is a wasteful number, since it uses less digits than its factorization.

720061761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106871.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 720061761 is about 26833.9665536052. The cubic root of 720061761 is about 896.3065759897.

The spelling of 720061761 in words is "seven hundred twenty million, sixty-one thousand, seven hundred sixty-one".