661152711 has 8 divisors (see below), whose sum is σ = 881826304. Its totient is φ = 440623800.

The previous prime is 661152697. The next prime is 661152719. The reversal of 661152711 is 117251166.

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

It is not a de Polignac number, because 661152711 - 2²¹ = 659055559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661152719) 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, 25015 + ... + 44136.

It is an arithmetic number, because the mean of its divisors is an integer number (110228288).

Almost surely, 2^661152711 is an apocalyptic number.

661152711 is a deficient number, since it is larger than the sum of its proper divisors (220673593).

661152711 is a wasteful number, since it uses less digits than its factorization.

661152711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72341.

The product of its digits is 2520, while the sum is 30.

The square root of 661152711 is about 25712.8899775968. The cubic root of 661152711 is about 871.1653520583.

The spelling of 661152711 in words is "six hundred sixty-one million, one hundred fifty-two thousand, seven hundred eleven".