661114986 has 16 divisors (see below), whose sum is σ = 1511120064. Its totient is φ = 188889984.

The previous prime is 661114973. The next prime is 661114999. The reversal of 661114986 is 689411166.

It is an interprime number because it is at equal distance from previous prime (661114973) and next prime (661114999).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 15740833 = 661114986 / (6 + 6 + 1 + 1 + 1 + 4 + 9 + 8 + 6).

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, 7870375 + ... + 7870458.

It is an arithmetic number, because the mean of its divisors is an integer number (94445004).

Almost surely, 2^661114986 is an apocalyptic number.

661114986 is an abundant number, since it is smaller than the sum of its proper divisors (850005078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661114986 is a wasteful number, since it uses less digits than its factorization.

661114986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15740845.

The product of its digits is 62208, while the sum is 42.

The square root of 661114986 is about 25712.1563856476. The cubic root of 661114986 is about 871.1487823423.

The spelling of 661114986 in words is "six hundred sixty-one million, one hundred fourteen thousand, nine hundred eighty-six".