64025661 has 32 divisors (see below), whose sum is σ = 100120576. Its totient is φ = 35640000.

The previous prime is 64025657. The next prime is 64025671. The reversal of 64025661 is 16652046.

It is not a de Polignac number, because 64025661 - 2² = 64025657 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 (64025671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193266 + ... + 193596.

It is an arithmetic number, because the mean of its divisors is an integer number (3128768).

Almost surely, 2^64025661 is an apocalyptic number.

64025661 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

64025661 is a deficient number, since it is larger than the sum of its proper divisors (36094915).

64025661 is a wasteful number, since it uses less digits than its factorization.

64025661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 64025661 is about 8001.6036517688. The cubic root of 64025661 is about 400.0534532732.

The spelling of 64025661 in words is "sixty-four million, twenty-five thousand, six hundred sixty-one".